WO2016179799A1 - 一种双频相控阵 - Google Patents
一种双频相控阵 Download PDFInfo
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- WO2016179799A1 WO2016179799A1 PCT/CN2015/078772 CN2015078772W WO2016179799A1 WO 2016179799 A1 WO2016179799 A1 WO 2016179799A1 CN 2015078772 W CN2015078772 W CN 2015078772W WO 2016179799 A1 WO2016179799 A1 WO 2016179799A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
- H04B7/0608—Antenna selection according to transmission parameters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
Definitions
- the present invention relates to the field of communications technologies, and in particular, to a dual frequency phased array.
- Phased array technology is an important branch of array antenna technology. It not only has the high gain characteristics of the array antenna, but also has the characteristics of adjustable antenna beam. It is widely used in the military field, but the technology is costly and greatly limited. The development of this technology in the civilian sector. With the development of civil communication, large communication capacity has become an important technological breakthrough point. In 4G communication, the traditional 6GHz frequency band has reached the limit. In order to meet the future large communication capacity, it is almost inevitable to explore the spectrum resources of higher frequency bands. Due to its wide available frequency band, the frequency band has become a hot spot in the industry. In the millimeter wave band, due to its large space loss, non-line of sight transmission (English full name: non line of sight, abbreviated: NLOS) and other problems, the phased array technology has been re-examined in the field of civil communication.
- NLOS non-line of sight transmission
- the conventional dual-frequency phased array includes three parts, one of which is a frequency conversion module for performing frequency conversion of a baseband signal to a radio frequency signal, and the other is a phase shifting channel for completing an RF signal. Phase shifting, the third of which is the array antenna, used to complete the radiation of the RF signal.
- the dual-frequency phased array as shown in FIG. 1 is a conventional parallel-fed phase shifting phased array. In order to realize dual frequency through the structure, the phase shifting channels of the two frequency bands are simply independent, when a certain frequency band is required. When the phased array is in effect, cut the switch to the channel in this band.
- This simple patchwork dual-frequency phased array has two bands that independently occupy resources, resulting in a system that is more redundant and consumes system resources.
- the present invention provides a dual-frequency phased array for solving the problem of independently occupying resources in two frequency bands in the dual-frequency phased array in the prior art, thereby effectively saving system resources.
- a first aspect of the present invention provides a dual frequency phased array comprising:
- a frequency modulation module a phase shifting module connected to the frequency modulation module
- the frequency modulation module is configured to perform frequency modulation between a baseband signal and an intermediate frequency signal
- the phase shifting module is configured to perform crosstalk phase shifting between the intermediate frequency signal and the series feed phase shift signal, the shifting
- the phase module includes a first coupler and a phase shifter, the first coupler being in series with the phase shifter, the first coupler for directional coupling between the intermediate frequency signal and the series feed phase shift signal
- the phase shifter is configured to phase shift between the intermediate frequency signal and the series feed phase shift signal;
- a switch is disposed between the phase shifting module and the frequency modulation module, the switch includes a first end and a second end, and the first end is configured to control a first frequency band of the dual frequency phased array. The second end is configured to control a second frequency band of the dual frequency phased array.
- the dual-frequency phased array further includes: an array antenna connected to the phase shifting module, the array antenna includes a first antenna and a second antenna;
- the first antenna is configured to radiate a signal corresponding to the first frequency band when the first end of the switch is connected, and to transmit the first antenna when the second end of the switch is connected The signal corresponding to the second frequency band.
- the dual-frequency phased array further includes:
- a frequency conversion module connected to the phase shifting module and the array antenna, and a local oscillator module connected to the frequency conversion module;
- the local oscillator module is configured to provide a local oscillator for the frequency conversion module, so that the frequency conversion module performs frequency conversion between the series feed phase shift signal and the frequency conversion signal.
- the series feed phase shift signal includes a first series feed phase shift signal and a second string feed phase shift signal
- the frequency conversion signal includes a first frequency conversion signal
- the first string feed signal and the first frequency conversion signal are located at On the first antenna
- the second serial feed signal is located on the second antenna
- the frequency conversion module includes a first mixer
- the local oscillator module includes a first local oscillator, and the first local oscillator is configured to provide a first local amplitude and a first local oscillator frequency for the first mixer, so that the first mixer performs Mixing between the first series feed phase shift signal and the first variable frequency signal.
- the phase shifting module is configured to sequentially pass the intermediate frequency signal from the first end of the phase shifting module a first coupler and the phase shifter, the first coupler directly coupling a portion of the intermediate frequency signal to the first antenna, the phase shifter not directly coupling the first coupler to Remaining the intermediate frequency signal on the first antenna is phase shifted to the first coupler to be coupled to the first antenna by the first coupler to obtain the first series feed phase shift signal,
- the first series-fed phase shifting signal is denoted as a cos[w 0 t+(n-1) ⁇ ], where a is the amplitude of the frequency modulation module, w 0 is the frequency of the frequency modulation module, and ⁇ is the phase shifting
- t is a time variable
- n is the number of branches of the first antenna
- the frequency conversion module is configured to mix the first series feed phase shift signal by the first mixer, and convert the frequency into the first frequency conversion signal, where the first frequency conversion signal is recorded as Where b is the first amplitude and w 1 is the first local oscillator frequency.
- the phase shifting module is configured to send the intermediate frequency signal from the second end of the phase shifting module Passing through the first coupler and the phase shifter in sequence, the first coupler directly coupling a portion of the intermediate frequency signal to the second antenna, the phase shifter to the first coupler not A residual intermediate frequency signal coupled directly to the second antenna is phase shifted to the first coupler to be coupled to the second antenna by the first coupler to obtain the second series feed phase shift signal
- the second series-fed phase shift signal is denoted as a cos[w 0 t+(m-1) ⁇ ], where m is the number of branches of the second antenna.
- the local oscillator module further includes: a second local oscillator;
- the frequency conversion signal further includes a second frequency conversion signal, and the second frequency conversion signal is located on the second antenna;
- the frequency conversion module further includes a second mixer
- the second local oscillator is configured to provide the second mixer with a second local amplitude and a second local oscillator frequency, so that the second mixer performs the second cross-feed phase shift signal and Mixing between the second variable frequency signals.
- the second end of the switch is connected, and the frequency conversion module is configured to use the second mixer to transmit the second string
- the phase-shifted phase signal is mixed, and the frequency conversion is the second frequency-converted signal, and the second frequency-converted signal is recorded as c is the second amplitude, and w 2 is the second local oscillator frequency.
- the frequency conversion module is configured to mix the first frequency conversion signal by using the first mixer, Frequency conversion is the first series feed phase shift signal, and the first series feed phase shift signal is recorded as a cos[w 0 t+(n-1) ⁇ ];
- the phase shifting module is configured to couple the first series feed phase shift signal to the phase shifting module by the first coupler, and obtain the intermediate frequency signal on the phase shifting module.
- the frequency conversion module is configured to use the second frequency converter to convert the second frequency conversion
- the signal is mixed, the frequency conversion is the second series feed phase shift signal, and the second series feed phase shift signal is recorded as a cos[w 0 t+(m-1) ⁇ ].
- the second end of the switch When the second series-feed phase shift signal is pre-converted into the intermediate frequency signal, the second end of the switch is connected, and the phase shifting module is configured to move the second string by the first coupler A phase signal is coupled to the phase shifting module, and the intermediate frequency signal is obtained on the phase shifting module.
- the dual-frequency phased array further includes: a load module connected to the local oscillator module;
- the load module is configured to absorb energy remaining after the local oscillator module provides the local oscillator.
- the frequency conversion module further includes: a second coupler connected to the local oscillator module;
- the second coupler is configured to ensure that the local oscillator module provides a constant local oscillator for the frequency conversion module.
- the dual-frequency phased array further includes: a control module connected to the phase module;
- the control module is configured to control beam pointing of the array antenna by adjusting a phase difference of the phase shifter.
- phase shifting module includes the first coupler And a phase shifter, the first coupler and the phase shifter are respectively used for directional coupling and phase shifting between the intermediate frequency signal and the series feed phase shift signal, and the dual frequency is realized by the first coupler and the phase shifter series feed phase shift,
- the first coupler and the phase shifter share system resources in series, which effectively saves system resources.
- FIG. 1 is a schematic structural diagram of a dual-frequency phased array in the prior art
- FIG. 2 is a schematic diagram of an embodiment of a dual-frequency phased array according to an embodiment of the present invention
- FIG. 3 is a schematic diagram of another embodiment of a dual-frequency phased array according to an embodiment of the present invention.
- FIG. 4 is a schematic diagram of another embodiment of a dual frequency phased array according to an embodiment of the present invention.
- FIG. 5 is a schematic diagram of another embodiment of a dual frequency phased array according to an embodiment of the present invention.
- FIG. 6 is a schematic structural diagram of a dual-frequency phased array according to an embodiment of the present invention.
- FIG. 7 is another schematic structural diagram of a dual frequency phased array according to an embodiment of the present invention.
- the invention discloses a dual-frequency phased array, which is used for solving the problem that the two frequency bands independently occupy resources in the dual-frequency phased array in the prior art, and effectively saves system resources.
- phase shifter is a component that controls the phase change of the signal and is widely used in radar systems, microwave communication systems, and measurement systems. According to different definition methods, phase shifters can be classified into different types. According to different control methods, it is divided into analog and digital; according to different working modes, it is divided into reflection type and transmission type; according to different circuit topology, it is divided into load line type, switch line type and switch network (high pass / low Pass filter type and so on.
- the coupler is an element for power distribution, and the coupler can be divided into a directional coupler, a power splitter, and various microwave splitters.
- the directional coupler is a general-purpose microwave/millimeter wave component that can be used for signal isolation, separation, and mixing, such as power monitoring, source output power stabilization, source isolation, transmission and reflection sweep testing. Its main technical indicators are directionality, standing wave ratio, coupling degree, and insertion loss.
- the directional coupler adopts various types such as a coaxial line, a strip line, a microstrip line, a metal waveguide or a dielectric waveguide. It works by the fact that the power transmitted in the main line is coupled to the secondary line in a number of ways and interferes with each other and is transmitted in only one direction in the secondary line.
- an embodiment of a dual-frequency phased array in the embodiment of the present invention includes:
- the frequency modulation module 201 is configured to perform frequency modulation between a baseband signal and an intermediate frequency signal
- the baseband signal is an original electrical signal sent by the source without modulation (frequency shifting and transforming), and the frequency is low.
- the frequency band module can frequency-modulate the baseband signal to an intermediate frequency signal, and the frequency of the intermediate frequency signal is higher than the frequency of the baseband signal;
- the FM module can also frequency modulate the intermediate frequency signal to a baseband signal.
- the phase shifting module 202 is used for phase-fed phase shifting between the intermediate frequency signal and the series-fed phase shifting signal, and the phase shifting module 202 includes a first coupler 2021 and a phase shifter 2022, the first coupler 2021 is connected in series with the phase shifter 2022, the first coupler 2021 is used for directional coupling between the intermediate frequency signal and the series feed phase shift signal, and the phase shifter 2022 is used for the intermediate frequency signal Phase shifting between the series feed phase shift signals;
- first couplers there may be multiple first couplers, and some of the first couplers directly perform directional coupling between the intermediate frequency signal and the series feed phase shift signal, and the first coupler does not directly implement the intermediate frequency signal and the series feed phase shift signal.
- the intermediate frequency signal and the string are further processed by the phase shifter Phase shifting between the phase-shifted phase signals, phase shifting to another portion of the first coupler until another portion of the first coupler performs directional coupling between the intermediate frequency signal and the series-fed phase shifting signal, thus making full use of the first coupling
- the directional coupling function of the device realizes the directional coupling between the intermediate frequency signal and the series-fed phase shifting signal, wherein the series-fed phase shifting signal is a signal of the intermediate frequency signal after the phase-fed phase shifting, that is, the series-fed phase shifting signal is the intermediate frequency signal
- a signal coupled to the array antenna is directional by a first coupler.
- the first coupler and the phase shifter are connected in series, thereby sharing system resources,
- a switch (such as the switch 602 shown in FIG. 6 or FIG. 7) is disposed between the phase shifting module 202 and the frequency modulation module 201, and the switch includes a first end and a second end, and the first end The first frequency band used to control the dual frequency phased array, and the second end is used to control the second frequency band of the dual frequency phased array.
- the switch since the dual-frequency phased array can realize two frequency bands, specifically a switch control frequency band, the switch includes a first end and a second end. When the first end is connected, the first end is used to control the first of the dual frequency phased array. Frequency band; when the second end is connected, the second end is used to control the second frequency band of the dual frequency phased array.
- the frequency modulation module performs frequency modulation between the baseband signal and the intermediate frequency signal
- the phase shifting module performs phase shifting phase shift between the intermediate frequency signal and the series feed phase shift signal
- the phase shifting module includes the first a coupler and a phase shifter, the first coupler and the phase shifter are respectively used for directional coupling and phase shifting between the intermediate frequency signal and the series feed phase shift signal, and the double phase is realized by the first coupler and the phase shifter series feed phase shift Frequency, and the first coupler and the phase shifter share system resources in series, which effectively saves system resources.
- another embodiment of the dual-frequency phased array in the embodiment of the present invention includes:
- the frequency modulation module 301 and the phase shifting module 302 are similar to the frequency modulation module 201 and the phase shifting module 202 in the embodiment shown in FIG. 2 .
- the frequency modulation module 301 and the phase shifting module 302 are similar to the frequency modulation module 201 and the phase shifting module 202 in the embodiment shown in FIG. 2 .
- the phase shifting module 302 includes a first coupler 3021 and a phase shifter 3022;
- the array antenna 303 includes a first antenna 3031 and a second antenna 3032;
- the first antenna 3031 is configured to: when the first end of the switch is connected, radiate a signal corresponding to the first frequency band; and the second antenna 3032 is configured to: when the second end of the switch is connected, the radiation station The signal corresponding to the second frequency band.
- the directional coupling function of the first coupler and the phase shifting function of the phase shifter are utilized to cross-phase shift the intermediate frequency signal.
- the first antenna radiates the cross-talk phase shift signal on the first antenna to implement a first frequency band;
- the second antenna radiates the cross-talk phase shift signal on the second antenna to implement the second frequency band.
- the corresponding antenna radiates the frequency-converted signal.
- the directional coupling of the first coupler and the phase shift of the phase shifter are fully utilized, and two frequency bands of the phased array are controlled by the two ends of the switch, and the first coupler and the phase shifter are It is connected in series to share system resources, which effectively saves system resources.
- another embodiment of the dual-frequency phased array in the embodiment of the present invention includes:
- the local oscillator module 405 is connected to the frequency conversion module 404.
- the frequency modulation module 401 and the phase shifting module 402 are similar to the frequency modulation module 201 and the phase shifting module 202 in the embodiment shown in FIG. 2 .
- the array antenna 403 is similar to the array antenna 403 in the embodiment shown in FIG. 3 .
- the array antenna 403 is similar to the array antenna 403 in the embodiment shown in FIG. 3 .
- the local oscillator module 405 is configured to provide a local oscillator for the frequency conversion module 404, so that the frequency conversion module 404 performs frequency conversion between the series feed phase shift signal and the frequency conversion signal.
- the local oscillator module provides the local oscillator to the frequency conversion module, so that the frequency conversion module has more effective frequency conversion, wherein the local oscillator is specifically the amplitude degree, the local oscillator frequency, the local oscillator phase, etc., and is not specifically limited herein.
- the series feed phase shift signal comprises a first series feed phase shift signal and a second string feed phase shift signal, the frequency conversion signal comprising a first frequency conversion signal, the first string feed signal and the first frequency conversion signal a signal is located on the first antenna, and the second serial signal is located on the second antenna;
- the frequency conversion module 404 includes a first mixer 4041;
- the local oscillator module 405 includes a first local oscillator 4051, and the first local oscillator 4051 is configured to be the first A mixer 4041 provides a first amplitude and a first local oscillator frequency such that the first mixer 4041 performs mixing between the first serial feed phase shift signal and the first variable frequency signal.
- the phase shifting module 402 is configured to sequentially perform the intermediate frequency signal from the first end of the phase shifting module 402. Passing the first coupler and the phase shifter, the first coupler directly couples the portion of the intermediate frequency signal to the first antenna, the phase shifter not directly directing the first coupler A residual intermediate frequency signal coupled to the first antenna is phase shifted to the first coupler to be coupled to the first antenna by the first coupler to obtain the first series feed phase shift signal,
- the first series-fed phase shifting signal is denoted by a cos[w 0 t+(n-1) ⁇ ], where a is the amplitude of the frequency modulation module, w 0 is the frequency of the frequency modulation module, and ⁇ is the The phase difference provided by the phase shifter, t is a time variable, and n is the number of branches of the first antenna;
- the frequency conversion module 404 is configured to mix the first series feed phase shift signal by the first mixer 4041, and convert the frequency into the first frequency conversion signal, where the first frequency conversion signal is recorded as Where b is the first amplitude and w 1 is the first local oscillator frequency.
- the phase shifting module 402 is configured to use the intermediate frequency signal from the second phase of the phase shifting module And passing the first coupler and the phase shifter in sequence, the first coupler directly coupling part of the intermediate frequency signal to the second antenna, and the phase shifter will be the first coupler A remaining intermediate frequency signal not directly coupled to the second antenna is phase shifted to the first coupler to be coupled to the second antenna by the first coupler to obtain the second series feed phase shift
- the signal, the second series-fed phase shift signal is denoted as a cos[w 0 t+(m-1) ⁇ ], and m is the number of branches of the second antenna.
- the first mixer is located on the branch where the first antenna is located, so that frequency conversion occurs, and there is no mixer on the branch where the second antenna is located, and no further frequency conversion is needed.
- the frequency conversion module is configured to mix the first frequency conversion signal by using the first frequency mixer Frequency, frequency conversion is the first series feed phase shift signal, and the first series feed phase shift signal is recorded as a cos[w 0 t+(n-1) ⁇ ];
- the phase shifting module is configured to couple the first series feed phase shift signal to the phase shifting module by the first coupler, and obtain the intermediate frequency signal on the phase shifting module.
- the phase shifting module is configured to couple the second series feed phase shift signal to the phase shifting module by the first coupler, and obtain the intermediate frequency signal on the phase shifting module.
- a process of transmitting a signal from the frequency modulation module to the array antenna and transmitting the signal from the array antenna to the frequency conversion module is respectively introduced, wherein, on the first antenna, the frequency conversion module performs the first series feed phase shift signal and the first Frequency conversion between a variable frequency signal, and the first local oscillator provides a corresponding local oscillator, and the dual frequency is realized by the first coupler and the phase shifter in the phase shifting module, and the first coupler and the phase shift
- the devices share system resources in series, which effectively saves system resources.
- another embodiment of the dual-frequency array antenna in the embodiment of the present invention includes:
- the local oscillator module 505 is connected to the frequency conversion module 504.
- the dual-frequency phased array further includes: a load module connected to the local oscillator module; and the load module is configured to absorb energy remaining after the local oscillator module provides the local oscillator.
- the frequency conversion module further includes: a second coupler connected to the local oscillator module;
- the second coupler is configured to ensure that the local oscillator module provides a constant local oscillator for the frequency conversion module. It can be seen that the second coupler assists the local oscillator module, so that the local oscillator module provides a constant local oscillator, that is, provides a constant local oscillator frequency and a local oscillator phase, and the local oscillator phase also needs to have an equal phase relationship or The phase relationship is determined so that the beam can be well controlled by the phase shifter.
- the series feed phase shift signal comprises a first series feed phase shift signal and a second string feed phase shift signal, the frequency conversion signal comprising a first frequency conversion signal, the first string feed signal and the first frequency conversion signal a signal is located on the first antenna, and the second serial signal is located on the second antenna;
- the frequency conversion module 504 includes a first mixer 5041;
- the local oscillator module 505 includes a first local oscillator 5051, and the first local oscillator 5051 is configured to provide the first local amplitude and the first local oscillator frequency to the first mixer 5041, so that the first hybrid
- the frequency converter 5041 performs mixing between the first series feed phase shift signal and the first frequency conversion signal.
- the phase shifting module 502 is configured to sequentially perform the intermediate frequency signal from the first end of the phase shifting module 502. Passing the first coupler and the phase shifter, the first coupler directly couples the portion of the intermediate frequency signal to the first antenna, the phase shifter not directly directing the first coupler A residual intermediate frequency signal coupled to the first antenna is phase shifted to the first coupler to be coupled to the first antenna by the first coupler to obtain the first series feed phase shift signal,
- the first series-fed phase shifting signal is denoted by a cos[w 0 t+(n-1) ⁇ ], where a is the amplitude of the frequency modulation module, w 0 is the frequency of the frequency modulation module, and ⁇ is the The phase difference provided by the phase shifter, t is a time variable, and n is the number of branches of the first antenna;
- the frequency conversion module 504 is configured to mix the first series feed phase shift signal by the first mixer 5041, and convert the frequency into the first frequency conversion signal, where the first frequency conversion signal is recorded as Where b is the first amplitude and w 1 is the first local oscillator frequency.
- the local oscillator module 505 further includes: a second local oscillator 5052;
- the frequency conversion signal further includes a second frequency conversion signal, and the second frequency conversion signal is located on the second antenna;
- the frequency conversion module 504 further includes a second mixer 5042;
- the second local oscillator 5052 is configured to provide the second mixer amplitude and the second local oscillator frequency for the second mixer 5042, so that the second mixer 5042 performs the second series feed phase shift Mixing between the signal and the second variable frequency signal.
- the phase shifting module is configured to send the intermediate frequency signal from the second end of the phase shifting module Passing through the first coupler and the phase shifter in sequence, the first coupler directly coupling a portion of the intermediate frequency signal to the second antenna, the phase shifter to the first coupler not A residual intermediate frequency signal coupled directly to the second antenna is phase shifted to the first coupler to be coupled to the second antenna by the first coupler to obtain the second series feed phase shift signal
- the second series-fed phase shift signal is denoted as a cos[w 0 t+(m-1) ⁇ ], where m is the number of branches of the second antenna.
- the frequency conversion module 504 is configured to use the second mixer to The series-fed phase shift signal is mixed, and the frequency conversion is the second frequency conversion signal, and the second frequency conversion signal is recorded as c is the second amplitude, and w 2 is the second local oscillator frequency.
- the frequency conversion module 504 is configured to perform the first frequency conversion signal by using the first frequency mixer Mixing, frequency conversion is the first series feed phase shift signal, and the first series feed phase shift signal is recorded as a cos[w 0 t+(n-1) ⁇ ];
- the phase shifting module is configured to couple the first series feed phase shift signal to the phase shifting module by the first coupler, and obtain the intermediate frequency signal on the phase shifting module.
- the frequency conversion module 504 is configured to use the second mixer to The second variable frequency signal is mixed, the frequency conversion is the second series feed phase shift signal, and the second serial feed phase shift signal is recorded as a cos[w 0 t+(m-1) ⁇ ].
- the second end of the switch When the second series-feed phase shift signal is pre-converted into the intermediate frequency signal, the second end of the switch is connected, and the phase shifting module is configured to move the second string by the first coupler A phase signal is coupled to the phase shifting module, and the intermediate frequency signal is obtained on the phase shifting module.
- the dual-frequency phased array further includes: a control module connected to the phase shifting module;
- the control module is configured to control beam pointing of the array antenna by adjusting a phase difference of the phase shifter.
- a process of transmitting a signal from the frequency modulation module to the array antenna and transmitting the signal from the array antenna to the frequency conversion module is respectively introduced, wherein, on the first antenna, the frequency conversion module performs the first series feed phase shift signal and the first a frequency conversion between the frequency conversion signals, and the first local oscillator provides a corresponding local oscillator, and on the second antenna, the frequency conversion module performs frequency conversion between the second series feed phase shift signal and the second frequency conversion signal, and the second The vibration provides a corresponding local oscillator, and the dual frequency is realized by the first coupler and the phase shifter in the phase shifting module, and the first coupler and the phase shifter share the system resources in series, thereby effectively saving system resources.
- an embodiment of an application scenario of the dual-frequency phased array in the embodiment of the present invention includes:
- the frequency modulation module 601 frequency-modulates the baseband signal to the phase shifting module 603 to obtain an intermediate frequency signal.
- the switch 602 can be a single-pole double-throw switch, including a first end and a second end. The first end can be regarded as the left side, the second end can be regarded as the right side, the switch 602 is switched to the left side, and the intermediate frequency signal will be left.
- a series of phase shifting signals are respectively mixed with the first mixers 6041 of the respective branches to obtain a first frequency conversion signal, and the signals of the first local oscillator module 6061 are sequentially passed from left to right through the second couplers 6062 of the respective stages.
- the first mixer 6041 is provided to provide a local oscillator
- the load module 607 is configured to absorb the energy remaining after the first local oscillator provides the local oscillator.
- the first series-fed phase shift signal on the A11 antenna is recorded as a cos w 0 t
- the first mixer signal on the A11 antenna is b cos w 1 t
- the first converted signal obtained after mixing Referred to as The first series-fed phase shift signal on the A12 antenna is a cos(w 0 t+ ⁇ )
- the first variable frequency signal obtained after mixing with the first mixer is recorded as
- the first variable frequency signal obtained by mixing the A1n antenna is recorded as
- first coupler 6031 of each branch in the phase shifting module 603 is the second coupler 6062 of each branch in the local oscillator module, it is required to ensure that the signal energy coupled to each branch is consistent. That is, the amplitudes of the branches are the same, and the phases of the local oscillator branches also need to have an equal phase relationship or a determined phase relationship so that the beam can be well controlled by the phase shifter 6032.
- the receiving link When the receiving link operates, that is, the signal is transmitted from the array antenna 605 to the frequency modulation module 601, the receiving link has the same principle as the transmitting link except that the signals are in opposite directions.
- the switch 602 When the switch 602 is connected to the left side, the array antenna 605 receives the first frequency conversion signal, and the first stage mixers 6041 are mixed with the first frequency conversion signal, and the frequency conversion is the first series feed phase shift signal, and the first series feed is shifted.
- the phase signal is denoted as a cos[w 0 t+(n-1) ⁇ ], and the phase shifting module 603 is configured to couple the first series-feed phase shift signal to the phase shifting module 603 by the first coupler 6031.
- the intermediate frequency signal is obtained on the phase shifting module 603, and then the frequency modulation module 601 frequency-modulates the intermediate frequency signal into a baseband signal.
- the transmitting link works, that is, the signal is transmitted from the frequency modulation module 601 to the array antenna, first, the frequency modulation module 601 modulates the baseband signal to the phase shifting module 603 to obtain an intermediate frequency signal, and when the switch 602 is connected to the right On the side, the intermediate frequency signal passes through the first coupler 6031 and the phase shifter 6032 from the right to the left, and reaches the array antenna 605, specifically the branch where the second antenna A2 is located, and obtains the second series feed phase shift signal.
- the first coupler couples a certain energy intermediate frequency signal to the branch where the A2m antenna is located, and the obtained second series feed phase shift signal is recorded as a cos w 0 t, and the phase shifter shifts the intermediate frequency signal not coupled to the A2m antenna.
- the second series-fed phase shift signal arriving at the A22 antenna is a cos[w 0 t+(m-2) ⁇ ]
- the second series of feeds arriving at the A21 antenna The phase signal is a cos[w 0 t+(m-1) ⁇ ]
- the adjacent antennas have a fixed phase difference ⁇ , which is the phase shift value provided by each phase shifter. After being radiated by each stage antenna, it will form.
- Specific beam pointing which adjusts the antenna wave when adjusting the phase shift value ⁇ of each phase shifter Point, the second antenna subsequent shift signal feedthrough radiation.
- the second antenna receives the second series feed phase shift signal, and the phase shifting module 603 moves the second series feed on the second antenna through the first coupler 6031.
- the signal is coupled to the phase shifting module 603, and the intermediate frequency signal is obtained on the phase shifting module 603.
- the frequency modulation module 601 frequency-modulates the intermediate frequency signal into a baseband signal.
- the structure shown in FIG. 7 includes two local oscillators, namely: a first local oscillator 6061 and a second local oscillator 6063, including Two types of mixers, namely a first mixer 6041 and a second mixer 6042, wherein the first local oscillator 6061 provides a local oscillator for the first mixer 6041 of all the first antenna A1 branches, and a second The local oscillator 6063 provides a local oscillator for the second mixer 6042 of all the second antenna A2 branches, and the load module 607 is configured to absorb the remaining energy after the first local oscillator and the second local oscillator provide the local oscillator, two The local oscillator has different working frequencies, and operates at w 1 and w 2 respectively, and respectively mixes the series-fed phase shift signals operating with w 0 to obtain a first frequency-converted signal with a frequency of w 0 +w 1 radiated by the A1 antenna, and the frequency.
- two local oscillator has different working frequencies, and operates at w 1 and w
- the second variable frequency signal of w 0 +w 2 is radiated by the A2 antenna, and since the series-fed phase shift signal of frequency w 0 is phase-controlled, the first converted signal and the second converted signal after the mixing are also phased. Control, so a specific antenna beam pointing can be obtained after radiation through the A1, A2 antenna array, and by adjusting the phase shifter 6 The phase shift value of 032 can control the beam pointing of the antenna at will.
- the first local oscillator 6061 and the second local oscillator 6063 reach the first mixer 6041 and the second mixer 6042 via the second coupler 6062 to ensure that the equal amplitudes are in phase or have equal amplitude and a determined phase relationship.
- the local oscillator signal provided by the first local oscillator 6061 passes through the second couplers 6062 from left to right to reach the first mixer 6041 of each A1 antenna.
- the local oscillator provided by the first local oscillator 6061 includes equal amplitude in-phase or equal amplitude and has a determined phase relationship; when the switch is connected to the left side, the intermediate frequency signal passes through the first coupler 6031 and shifts from left to right.
- the phaser 6032 reaches the A1 antenna to obtain the first series feed phase shift signal, and the first series feed phase shift signal arriving at the A11 antenna is a cos w 0 t, and the first series feed phase shift signal on the A12 antenna is a Cos(w 0 t+ ⁇ ), the first series-fed phase shift signal arriving at the A1n antenna is a cos[w 0 t+(n-1) ⁇ ], and the first series-fed phase shift signal is respectively coupled to the first mixer 6041 mixing to obtain the first variable frequency signal, and the first frequency conversion signal on the A11 antenna is The first variable frequency signal on the A12 antenna is The first variable frequency signal on the A1n antenna is At this time, the phased array will operate at a frequency of ⁇ 0 + ⁇ 1 , and a fixed phase difference ⁇ exists between the branches of adjacent first antennas, and the antenna beam is controlled by controlling the phase shift value ⁇ of the phase shifter 6032. direction.
- the array antenna 605 receives the first variable frequency signal, and the first mixers 6041 of the stages are mixed with the first frequency conversion signal, and the frequency conversion is the first series feed phase shift signal.
- the first series-fed phase shifting signal is recorded as a cos[w 0 t+(n-1) ⁇ ], and the phase shifting module 603 is configured to couple the first series-feed phase-shifting signal by the first coupler 6031 To the phase shifting module 603, the intermediate frequency signal is obtained on the phase shifting module 603, and then the frequency modulation module 601 frequency-modulates the intermediate frequency signal into a baseband signal.
- the local oscillator signal provided by the second local oscillator 6063 passes through the second couplers 6062 from left to right to reach the second mixer 6042 of each A2 antenna.
- the local oscillator is provided.
- the switch is connected to the right side, the intermediate frequency signal passes through the first coupler 6031 and the phase shifter 6032 from left to right, and reaches the A2 antenna to obtain a second series feed phase shift signal, reaching the A21 antenna.
- the two-string feed phase shift signal is a cos w 0 t
- the first mixer signal on the A21 antenna is c cos w 2 t
- the second variable frequency signal obtained after mixing is recorded as
- the second series-fed phase shift signal on the A22 antenna is a cos(w 0 t+ ⁇ )
- the second variable frequency signal obtained after mixing with the second mixer 6042 is recorded as
- the second series-feed phase shift signal on the Ada antenna is a cos[w 2 t+(m-1) ⁇ ]
- the second mixer 6042 is mixed to obtain a second frequency conversion signal.
- the phased array will operate at a frequency of ⁇ 0 + ⁇ 2 , and a fixed phase difference ⁇ exists between the branches of adjacent second antennas, and the antenna beam is controlled by controlling the phase shift value ⁇ of the phase shifter 6032. direction.
- the receiving link When the receiving link operates, that is, the signal is transmitted from the array antenna 605 to the frequency modulation module 601, the receiving link has the same principle as the transmitting link except that the signals are in opposite directions.
- the switch 602 When the switch 602 is connected to the right side, the array antenna 605 receives the second variable frequency signal, and the second mixers 6042 of the stages are mixed with the second frequency conversion signal, and the frequency conversion is the second series feed phase shift signal, and the second series feed is shifted.
- the phase signal is denoted as a cos[w 0 t+(m-1) ⁇ ], and the phase shifting module 603 is configured to couple the second series-feed phase shift signal to the phase shifting module 603 by the first coupler 6031.
- the intermediate frequency signal is obtained on the phase shifting module 603, and then the frequency modulation module 601 frequency-modulates the intermediate frequency signal into a baseband signal.
- the frequency modulation module performs frequency modulation between the baseband signal and the intermediate frequency signal
- the phase shifting module performs phase-feed phase shifting between the intermediate frequency signal and the series-fed phase shifting signal
- the phase shifting module includes the first coupler And a phase shifter, the first coupler and the phase shifter are respectively used between the intermediate frequency signal and the series feed phase shift signal
- the directional coupling and phase shifting realize dual frequency by the first coupler and the phase shifter series-feed phase shift, and the first coupler and the phase shifter share the system resources in series, which effectively saves system resources.
- the disclosed system, apparatus, and method may be implemented in other manners.
- the device embodiments described above are merely illustrative.
- the division of cells is only a logical function division.
- multiple units or components may be combined or integrated. Go to another system, or some features can be ignored or not executed.
- the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
- the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
- each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
- the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
- An integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, can be stored in a computer readable storage medium.
- the technical solution of the present invention which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium.
- a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the various embodiments of the present invention.
- the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), and a random A variety of media that can store program code, such as a memory (RAM, Random Access Memory), a disk, or an optical disk.
- ROM Read-Only Memory
- RAM Random Access Memory
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Abstract
本发明实施例公开一种双频相控阵,用于解决现有技术中双频相控阵中的两个频段独立占用资源的问题,节省***资源。所述双频相控阵包括:调频模块、与所述调频模块连接的移相模块;所述调频模块用于基带信号与中频信号之间的调频;所述移相模块用于所述中频信号与串馈移相信号之间的串馈移相,所述移相模块包括第一耦合器和移相器,所述第一耦合器与所述移相器串联,所述第一耦合器用于所述中频信号与所述串馈移相信号之间的定向耦合,所述移相器用于所述中频信号与所述串馈移相信号之间的移相。
Description
本发明涉及通信技术领域,具体涉及一种双频相控阵。
相控阵技术是阵列天线技术的一个重要分支,它不仅具有阵列天线的高增益特性,而且具有天线波束可调的特性,在军用领域得到广泛应用,但该技术成本高,极大的限制了该技术在民用领域的发展。随着民用通信的发展,大通信容量成为重要的技术突破点,在4G通信中,传统的6GHz频段已经达到极限,为了满足未来大通信容量,发掘更高频段的频谱资源几乎成为必然,毫米波频段由于其具有广阔的可用频段,如今已成为业界研究的热点。在毫米波频段,由于其空间损耗大,非视线传输(英文全称:non line of sight,缩写:NLOS)能力差等问题,使得相控阵技术在民用通信领域重新被研究。
现代通信领域,双频段问题一直存在,因此开发双频段通信***成为必然。如图1所示为传统的双频相控阵,其包含三个部分,其一是变频模块,用于完成基带信号到射频信号的变频,其二是移相通道,用于完成射频信号的移相,其三是阵列天线,用于完成射频信号的辐射。如图1所示的双频相控阵是传统的并馈射频移相相控阵,为了通过该结构实现双频,简单的将两个频段的移相通道分别独立,当需要某个频段的相控阵时,将开关切到该频段的通道上。这种简单拼凑的双频相控阵,其两个频段独立占用资源,导致***较为拢余,耗费***资源。
发明内容
有鉴于此,本发明提供一种双频相控阵,用于解决现有技术中双频相控阵中的两个频段独立占用资源的问题,有效节省***资源。
本发明第一方面提供一种双频相控阵,包括:
调频模块、与所述调频模块连接的移相模块;
所述调频模块用于基带信号与中频信号之间的调频;
所述移相模块用于所述中频信号与串馈移相信号之间的串馈移相,所述移
相模块包括第一耦合器和移相器,所述第一耦合器与所述移相器串联,所述第一耦合器用于所述中频信号与所述串馈移相信号之间的定向耦合,所述移相器用于所述中频信号与所述串馈移相信号之间的移相;
其中,所述移相模块与所述调频模块之间设置有开关,所述开关包括第一端和第二端,所述第一端用于控制所述双频相控阵的第一频段,所述第二端用于控制所述双频相控阵的第二频段。
结合第一方面,在第一种可能的实现方式中,所述双频相控阵还包括:与所述移相模块连接的阵列天线,所述阵列天线包括第一天线和第二天线;
所述第一天线用于当所述开关的第一端连通时,辐射所述第一频段对应的信号;所述第二天线用于当所述开关的第二端连通时,辐射所述第二频段对应的信号。
结合第一方面的第一种可能的实现方式,在第二种可能的实现方式中,所述双频相控阵还包括:
与所述移相模块与所述阵列天线连接的变频模块、与所述变频模块连接的本振模块;
所述本振模块用于为所述变频模块提供本振,使得所述变频模块进行所述串馈移相信号与变频信号之间的变频。
结合第一方面的第二种可能的实现方式,在第三种可能的实现方式中,
所述串馈移相信号包括第一串馈移相信号和第二串馈移相信号,所述变频信号包括第一变频信号,所述第一串馈信号和所述第一变频信号位于所述第一天线上,所述第二串馈信号位于所述第二天线上;
所述变频模块包括第一混频器;
所述本振模块包括第一本振,所述第一本振用于为所述第一混频器提供第一本振幅度以及第一本振频率,使得所述第一混频器进行所述第一串馈移相信号与所述第一变频信号之间的混频。
结合第一方面的第三种可能的实现方式,在第四种可能的实现方式中,
当所述中频信号预转换成所述第一变频信号时,所述开关的第一端连通,所述移相模块用于将所述中频信号从所述移相模块的第一端依次经过所述第一耦合器和所述移相器,所述第一耦合器将部分所述中频信号直接耦合到所述
第一天线上,所述移相器将所述第一耦合器未直接耦合到所述第一天线上的剩余中频信号移相到所述第一耦合器,从而通过所述第一耦合器耦合到所述第一天线上,得到所述第一串馈移相信号,所述第一串馈移相信号记作a cos[w0t+(n-1)φ],其中,a为所述调频模块的幅度,w0为所述调频模块的频率,φ为所述移相器提供的相位差,t为时间变量,n为所述第一天线的支路个数;
结合第一方面的第四种可能的实现方式,在第五种可能的实现方式中,
当所述中频信号预转换成所述第二串馈移相信号时,所述开关的第二端连通,所述移相模块用于将所述中频信号从所述移相模块的第二端依次经过所述第一耦合器和所述移相器,所述第一耦合器将部分所述中频信号直接耦合到所述第二天线上,所述移相器将所述第一耦合器未直接耦合到所述第二天线上的剩余中频信号移相到所述第一耦合器,从而通过所述第一耦合器耦合到所述第二天线上,得到所述第二串馈移相信号,所述第二串馈移相信号记作a cos[w0t+(m-1)φ],m为所述第二天线的支路个数。
结合第一方面的第四种可能的实现方式,在第六种可能的实现方式中,
所述本振模块还包括:第二本振;
所述变频信号还包括第二变频信号,所述第二变频信号位于所述第二天线上;
所述变频模块还包括第二混频器;
所述第二本振用于为所述第二混频器提供第二本振幅度以及第二本振频率,以使得所述第二混频器进行所述第二串馈移相信号与所述第二变频信号之间的混频。
结合第一方面的第六种可能的实现方式,在第七种可能的实现方式中,
当所述第二串馈移相信号预转换成所述第二变频信号时,所述开关的第二端连通,所述变频模块用于通过所述第二混频器将所述第二串馈移相信号进行混频,变频为所述第二变频信号,所述第二变频信号记作c为第二本振幅度,w2为第二本振频率。
结合第一方面的第四种可能的实现方式,在第八种可能的实现方式中,
当所述第一变频信号预转换成所述中频信号时,所述开关的第一端连通,所述变频模块用于通过所述第一混频器将所述第一变频信号进行混频,变频为所述第一串馈移相信号,所述第一串馈移相信号记作a cos[w0t+(n-1)φ];
所述移相模块用于通过所述第一耦合器将所述第一串馈移相信号耦合到所述移相模块上,在所述移相模块上得到所述中频信号。
结合第一方面的第八种可能的实现方式,在第九种可能的实现方式中,
当所述第二变频信号预转换成所述第二串馈移相信号时,所述开关的第二端连通,所述变频模块用于通过所述第二混频器将所述第二变频信号进行混频,变频为所述第二串馈移相信号,所述第二串馈移相信号记作a cos[w0t+(m-1)φ]。
结合第一方面的第九种可能的实现方式,在第十种可能的实现方式中,
当所述第二串馈移相信号预转换成所述中频信号时,所述开关的第二端连通,所述移相模块用于通过所述第一耦合器将所述第二串馈移相信号耦合到所述移相模块上,在所述移相模块上得到所述中频信号。
结合第一方面的第二种可能的实现方式,在第十一种可能的实现方式中,所述双频相控阵还包括:与所述本振模块连接的负载模块;
所述负载模块用于吸收所述本振模块提供本振后剩余的能量。
结合第一方面的第二种可能的实现方式,在第十二种可能的实现方式中,所述变频模块还包括:与所述本振模块连接的第二耦合器;
所述第二耦合器用于确保所述本振模块为所述变频模块提供恒定的本振。
结合第一方面或者第一方面的第一种至第十二种任意一种可能的实现方式,在第十三种可能的实现方式中,所述双频相控阵还包括:与所述移相模块连接的控制模块;
所述控制模块用于通过调节所述移相器的相位差控制所述阵列天线的波束指向。
应用以上技术方案,通过调频模块进行基带信号与中频信号之间的调频,通过移相模块进行中频信号与串馈移相信号之间的串馈移相,其中,移相模块包括第一耦合器和移相器,第一耦合器和移相器分别用于中频信号与串馈移相信号之间的定向耦合与移相,通过第一耦合器和移相器串馈移相实现双频,而第一耦合器与移相器串联共用***资源,有效节省***资源。
图1为现有技术中双频相控阵的一个结构示意图;
图2为本发明实施例中双频相控阵的一个实施例示意图;
图3为本发明实施例中双频相控阵的另一个实施例示意图;
图4为本发明实施例中双频相控阵的另一个实施例示意图;
图5为本发明实施例中双频相控阵的另一个实施例示意图;
图6为本发明实施例中双频相控阵的一个结构示意图;
图7为本发明实施例中双频相控阵的另一个结构示意图。
本发明公开了一种双频相控阵,用于解决现有技术中双频相控阵中的两个频段独立占用资源的问题,有效节省***资源。
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”、“第三”、“第四”等(如果存在)是用于区别类似的对象,而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换,以便这里描述的本发明的实施例例如能够以除了在这里图示或描述的那些以外的顺序实施。此外,术语“包括”和“具有”以及他们的任何变形,意图在于覆盖不排他的包含,例如,包含了一系列步骤或单元的过程、方法、***、产品或设备不必限于清楚地列出的那些步骤或单元,而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
为了方便理解本发明实施例,首先在此介绍本发明实施例描述中会引入的
几个要素;
移相器;
移相器是控制信号相位变化的元件,广泛地应用于雷达***、微波通信***和测量***等,根据不同的定义方法,移相器可以划分为不同的种类。根据控制方式的不同,分为模拟式和数字式;根据工作方式的不同,分为反射型和传输型;根据电路拓扑的不同,分为加载线型、开关线型和开关网络(高通/低通滤波器)型等。
耦合器;
耦合器是用于功率分配的元件,耦合器可分为定向耦合器、功率分配器以及各种微波分支器等。定向耦合器是一种通用的微波/毫米波元件,可用于信号的隔离、分离和混合,如功率的监测、源输出功率稳幅、信号源隔离、传输和反射的扫频测试等。它的主要技术指标有方向性、驻波比、耦合度、***损耗。定向耦合器采用同轴线、带状线、微带线、金属波导或介质波导等各种型式。它的工作原理是主线中传输的功率通过多种途径耦合到副线,并互相干涉而在副线中只沿一个方向传输。
请参阅图2,本发明实施例中双频相控阵的一个实施例包括:
调频模块201、与所述调频模块201连接的移相模块202;
所述调频模块201用于基带信号与中频信号之间的调频;
基带信号是信源发出的没有经过调制(进行频谱搬移和变换)的原始电信号,频率较低,通过调频模块可将基带信号调频为中频信号,中频信号的频率比基带信号的频率高;反之,调频模块还可以将中频信号调频为基带信号。
所述移相模块202用于所述中频信号与串馈移相信号之间的串馈移相,所述移相模块202包括第一耦合器2021和移相器2022,所述第一耦合器2021与所述移相器2022串联,所述第一耦合器2021用于所述中频信号与所述串馈移相信号之间的定向耦合,所述移相器2022用于所述中频信号与所述串馈移相信号之间的移相;
例如,第一耦合器可以有多个,部分第一耦合器直接进行中频信号与串馈移相信号之间的定向耦合,而该部分第一耦合器没有直接实现中频信号与串馈移相信号之间的定向耦合的情况下,进一步通过移相器进行中频信号与所述串
馈移相信号之间的移相,移相到另一部分第一耦合器上,直到另一部分第一耦合器进行中频信号与串馈移相信号之间的定向耦合,因此,充分利用第一耦合器的定向耦合功能,实现中频信号和串馈移相信号之间的定向耦合,其中,串馈移相信号为中频信号进行串馈移相后的信号,即串馈移相信号是将中频信号通过第一耦合器定向耦合到阵列天线上的信号。在本发明中,第一耦合器与移相器之间是串联的,从而共用***资源,有效节省了***资源。
其中,所述移相模块202与所述调频模块201之间设置有开关(如图6或图7所示的开关602),所述开关包括第一端和第二端,所述第一端用于控制所述双频相控阵的第一频段,所述第二端用于控制所述双频相控阵的第二频段。
由于双频相控阵能够实现两个频段,而具体为开关控制频段,开关包括第一端和第二端,当第一端连通时,第一端用于控制双频相控阵的第一频段;当第二端连通时,第二端用于控制双频相控阵的第二频段。
在本发明实施例中,通过调频模块进行基带信号与中频信号之间的调频,通过移相模块进行中频信号与串馈移相信号之间的串馈移相,其中,移相模块包括第一耦合器和移相器,第一耦合器和移相器分别用于中频信号与串馈移相信号之间的定向耦合与移相,通过第一耦合器和移相器串馈移相实现双频,而第一耦合器与移相器串联共用***资源,有效节省了***资源。
在图2所示实施例的基础上,请参阅图3,本发明实施例中双频相控阵的另一个实施例包括:
调频模块301、与所述调频模块301连接的移相模块302、与所述移相模块连接302的阵列天线303。
调频模块301,移相模块302与图2所示实施例中的调频模块201,移相模块202相似,具体参阅图2所示实施例,此处不再赘述。
所述移相模块302包括第一耦合器3021和移相器3022;
所述阵列天线303包括第一天线3031和第二天线3032;
所述第一天线3031用于当所述开关的第一端连通时,辐射所述第一频段对应的信号;所述第二天线3032用于当所述开关的第二端连通时,辐射所述第二频段对应的信号。
例如,当信号从移相模块发射到阵列天线,且开关的第一端连通时,充分利用第一耦合器的定向耦合功能,以及移相器的移相功能,将中频信号进行串馈移相到第一天线上得到串馈移相信号,第一天线辐射该第一天线上的串馈移相信号,实现第一频段;当信号从移相模块发射到阵列天线,且开关的第二端连通时,在第二天线上得到串馈移相信号,第二天线辐射该第二天线上的串馈移相信号,实现第二频段。
需要说明的是,当第一天线上的串馈移相信号或者第二天线上的串馈移相信号发生变频后,对应的天线辐射变频后的信号。
本发明实施例中,充分利用第一耦合器的定向耦合与移相器的移相,并且通过开关的两个端控制相控阵的两个频段,而第一耦合器与移相器之间是串联的,从而共用***资源,有效节省了***资源。
在图3所示实施例的基础上,请参阅图4,本发明实施例中双频相控阵的另一个实施例包括:
调频模块401、与所述调频模块401连接的移相模块402、与所述移相模块连接402的阵列天线403、与所述移相模块402与所述阵列天线403连接的变频模块404、与所述变频模块404连接的本振模块405。
调频模块401,移相模块402与图2所示实施例中的调频模块201,移相模块202相似,具体参阅图2所示实施例,此处不再赘述。
阵列天线403与图3所示实施例中的阵列天线403相似,具体参阅图3所示实施例,此处不再赘述。
所述本振模块405用于为所述变频模块404提供本振,使得所述变频模块404进行所述串馈移相信号与变频信号之间的变频。
可以理解的是,本振模块给变频模块提供本振,使得变频模块更有效的变频,其中,本振具体为本振幅度,本振频率,本振相位等,此处不做具体限定。
优选的,所述串馈移相信号包括第一串馈移相信号和第二串馈移相信号,所述变频信号包括第一变频信号,所述第一串馈信号和所述第一变频信号位于所述第一天线上,所述第二串馈信号位于所述第二天线上;
所述变频模块404包括第一混频器4041;
所述本振模块405包括第一本振4051,所述第一本振4051用于为所述第
一混频器4041提供第一本振幅度以及第一本振频率,使得所述第一混频器4041进行所述第一串馈移相信号与所述第一变频信号之间的混频。
当所述中频信号预转换成所述第一变频信号时,所述开关的第一端连通,所述移相模块402用于将所述中频信号从所述移相模块402的第一端依次经过所述第一耦合器和所述移相器,所述第一耦合器将部分所述中频信号直接耦合到所述第一天线上,所述移相器将所述第一耦合器未直接耦合到所述第一天线上的剩余中频信号移相到所述第一耦合器,从而通过所述第一耦合器耦合到所述第一天线上,得到所述第一串馈移相信号,所述第一串馈移相信号记作a cos[w0t+(n-1)φ],其中,a为所述调频模块的幅度,w0为所述调频模块的频率,φ为所述移相器提供的相位差,t为时间变量,n为所述第一天线的支路个数;
当所述中频信号预转换成所述第二串馈移相信号时,所述开关的第二端连通,所述移相模块402用于将所述中频信号从所述移相模块的第二端依次经过所述第一耦合器和所述移相器,所述第一耦合器将部分所述中频信号直接耦合到所述第二天线上,所述移相器将所述第一耦合器未直接耦合到所述第二天线上的剩余中频信号移相到所述第一耦合器,从而通过所述第一耦合器耦合到所述第二天线上,得到所述第二串馈移相信号,所述第二串馈移相信号记作a cos[w0t+(m-1)φ],m为所述第二天线的支路个数。
可以理解的是,在本实施例中,第一天线所在的支路上有第一混频器,因此会发生变频,而第二天线所在的支路上没有混频器,则不需要进一步变频。
进一步,当所述第一变频信号预转换成所述中频信号时,所述开关的第一端连通,所述变频模块用于通过所述第一混频器将所述第一变频信号进行混频,变频为所述第一串馈移相信号,所述第一串馈移相信号记作a cos[w0t+(n-1)φ];
所述移相模块用于通过所述第一耦合器将所述第一串馈移相信号耦合到所述移相模块上,在所述移相模块上得到所述中频信号。
当所述第二串馈移相信号预转换成所述中频信号时,所述开关的第二端连
通,所述移相模块用于通过所述第一耦合器将所述第二串馈移相信号耦合到所述移相模块上,在所述移相模块上得到所述中频信号。
在本发明实施例中,分别介绍了信号从调频模块发射到阵列天线以及信号从阵列天线发射到变频模块的过程,其中,在第一天线上,变频模块进行第一串馈移相信号与第一变频信号之间的变频,而第一本振给提供相应的本振,通过移相模块中的第一耦合器和移相器串馈移相实现双频,而第一耦合器与移相器串联共用***资源,有效节省了***资源。
本图4所示实施例的基础上,请参阅图5,本发明实施例中双频阵列天线的另一个实施例包括:
调频模块501、与所述调频模块501连接的移相模块502、与所述移相模块连接502的阵列天线503、与所述移相模块502与所述阵列天线503连接的变频模块504、与所述变频模块504连接的本振模块505。
在一些可选的实施例中,所述双频相控阵还包括:与所述本振模块连接的负载模块;所述负载模块用于吸收所述本振模块提供本振后剩余的能量。
在一些可选的实施例中,所述变频模块还包括:与所述本振模块连接的第二耦合器;
所述第二耦合器用于确保所述本振模块为所述变频模块提供恒定的本振。可见,第二耦合器对本振模块起到辅助作用,使得本振模块提供恒定的本振,即提供恒定不变的本振频率和本振相位,此外本振相位也需要有相等的相位关系或者确定的相位关系以便波束能通过移相器得到很好的控制。
优选的,所述串馈移相信号包括第一串馈移相信号和第二串馈移相信号,所述变频信号包括第一变频信号,所述第一串馈信号和所述第一变频信号位于所述第一天线上,所述第二串馈信号位于所述第二天线上;
所述变频模块504包括第一混频器5041;
所述本振模块505包括第一本振5051,所述第一本振5051用于为所述第一混频器5041提供第一本振幅度以及第一本振频率,使得所述第一混频器5041进行所述第一串馈移相信号与所述第一变频信号之间的混频。
当所述中频信号预转换成所述第一变频信号时,所述开关的第一端连通,所述移相模块502用于将所述中频信号从所述移相模块502的第一端依次经过
所述第一耦合器和所述移相器,所述第一耦合器将部分所述中频信号直接耦合到所述第一天线上,所述移相器将所述第一耦合器未直接耦合到所述第一天线上的剩余中频信号移相到所述第一耦合器,从而通过所述第一耦合器耦合到所述第一天线上,得到所述第一串馈移相信号,所述第一串馈移相信号记作a cos[w0t+(n-1)φ],其中,a为所述调频模块的幅度,w0为所述调频模块的频率,φ为所述移相器提供的相位差,t为时间变量,n为所述第一天线的支路个数;
所述本振模块505还包括:第二本振5052;
所述变频信号还包括第二变频信号,所述第二变频信号位于所述第二天线上;
所述变频模块504还包括第二混频器5042;
所述第二本振5052用于为所述第二混频器5042提供第二本振幅度以及第二本振频率,以使得所述第二混频器5042进行所述第二串馈移相信号与所述第二变频信号之间的混频。
当所述中频信号预转换成所述第二串馈移相信号时,所述开关的第二端连通,所述移相模块用于将所述中频信号从所述移相模块的第二端依次经过所述第一耦合器和所述移相器,所述第一耦合器将部分所述中频信号直接耦合到所述第二天线上,所述移相器将所述第一耦合器未直接耦合到所述第二天线上的剩余中频信号移相到所述第一耦合器,从而通过所述第一耦合器耦合到所述第二天线上,得到所述第二串馈移相信号,所述第二串馈移相信号记作a cos[w0t+(m-1)φ],m为所述第二天线的支路个数。
当所述第二串馈移相信号预转换成所述第二变频信号时,所述开关的第二端连通,所述变频模块504用于通过所述第二混频器将所述第二串馈移相信号进行混频,变频为所述第二变频信号,所述第二变频信号记作c为第二本振幅度,w2为第二本振频率。
进一步,当所述第一变频信号预转换成所述中频信号时,所述开关的第一端连通,所述变频模块504用于通过所述第一混频器将所述第一变频信号进行
混频,变频为所述第一串馈移相信号,所述第一串馈移相信号记作a cos[w0t+(n-1)φ];
所述移相模块用于通过所述第一耦合器将所述第一串馈移相信号耦合到所述移相模块上,在所述移相模块上得到所述中频信号。
进一步,当所述第二变频信号预转换成所述第二串馈移相信号时,所述开关的第二端连通,所述变频模块504用于通过所述第二混频器将所述第二变频信号进行混频,变频为所述第二串馈移相信号,所述第二串馈移相信号记作a cos[w0t+(m-1)φ]。
当所述第二串馈移相信号预转换成所述中频信号时,所述开关的第二端连通,所述移相模块用于通过所述第一耦合器将所述第二串馈移相信号耦合到所述移相模块上,在所述移相模块上得到所述中频信号。
在一些可选的实施例中,所述双频相控阵还包括:与所述移相模块连接的控制模块;
所述控制模块用于通过调节所述移相器的相位差控制所述阵列天线的波束指向。
在本发明实施例中,分别介绍了信号从调频模块发射到阵列天线以及信号从阵列天线发射到变频模块的过程,其中,在第一天线上,变频模块进行第一串馈移相信号与第一变频信号之间的变频,而第一本振给提供相应的本振,在第二天线上,变频模块进行第二串馈移相信号与第二变频信号之间的变频,而第二本振给提供相应的本振,通过移相模块中的第一耦合器和移相器串馈移相实现双频,而第一耦合器与移相器串联共用***资源,有效节省了***资源。
在以上实施例的基础上,请参阅图6和图7,本发明实施例中双频相控阵的一个应用场景的实施例包括:
请参阅图6,以第一频段工作为例,当发射链路工作时,即信号从调频模块601发射到阵列天线605,首先调频模块601将基带信号调频到移相模块603上,得到中频信号,开关602可为单刀双掷开关,包括第一端和第二端,第一端可以看作左侧,第二端可以看作右侧,将开关602切换到左侧,中频信号将从左到右依次经过第一耦合器6031和移相器6032,到达阵列天线605上,具体
到达为第一天线A1所在的支路,得到第一串馈移相信号,其中,A表示阵列天线,第一串馈移相信号分别与各支路的第一混频器6041进行混频,得到第一变频信号,第一本振模块6061的信号从左到右依次经过各级第二耦合器6062分别到达各级第一混频器6041以提供本振,负载模块607用于吸收所述第一本振提供本振后剩余的能量。其中,在A11天线上的第一串馈移相信号记为a cos w0t,在A11天线上的第一混频器信号为b cos w1t,经混频之后得到的第一变频信号记作在A12天线上的第一串馈移相信号为a cos(w0t+φ),与第一混频器混频之后得到的第一变频信号记作同理A1n天线经混频之后得到的第一变频信号记作其中,当开关切换到左侧时,将双频相控阵以w0+w1频率工作,并且各相邻第一天线的支路之间仍然存在由移相器6032产生的相位差φ,因此当调节移相器6032的移相值时就可以调节天线波束指向。需要说明的是,无论是移相模块603中各支路的第一耦合器6031还是本振模块中各支路的第二耦合器6062,需要保证的是耦合到各支路的信号能量一致,即各支路幅度一致,此外各本振支路的相位也需要有相等的相位关系或者确定的相位关系以便波束能通过移相器6032得到很好的控制。
当接收链路工作时,即信号从阵列天线605发射到调频模块601,接收链路与发射链路原理相同,只是信号方向相反。当开关602连通左侧,阵列天线605接收第一变频信号,各级第一混频器6041与第一变频信号进行混频,变频为第一串馈移相信号,所述第一串馈移相信号记作a cos[w0t+(n-1)φ],移相模块603用于通过所述第一耦合器6031将所述第一串馈移相信号耦合到所述移相模块603上,在所述移相模块603上得到所述中频信号,然后,调频模块601将该中
频信号调频为基带信号。
以第二频段工作为例,当发射链路工作时,即信号从调频模块601发射到阵列天线,首先调频模块601将基带信号调制到移相模块603上,得到中频信号,当开关602连通右侧时,中频信号从右到左依次经过各级第一耦合器6031和移相器6032,到达阵列天线605上,具体为第二天线A2所在的支路,得到第二串馈移相信号,第一耦合器将一定能量的中频信号耦合到A2m天线所在的支路上,得到的第二串馈移相信号记为a cos w0t,移相器将未耦合到A2m天线的中频信号进行移相,依次从右到左经过每一级耦合移相,到达A22天线的第二串馈移相信号为a cos[w0t+(m-2)φ],到达A21天线的第二串馈移相信号为a cos[w0t+(m-1)φ],相邻天线之间具有固定的相位差φ,即为各移相器提供的移相值,经各级天线辐射后,将形成特定的波束指向,当调节各级移相器移相值φ时也就调节了天线波束指向,后续第二天线将第二串馈移相信号进行辐射。
当接收链路工作时,当开关602连通右侧时,第二天线接收第二串馈移相信号,移相模块603通过第一耦合器6031将将第二天线上的第二串馈移相信号耦合到移相模块603上,在移相模块603上得到中频信号,然后,调频模块601将该中频信号调频为基带信号。
在图6的基础上,请参阅图7,与图6所示结构不同的是,图7所示的结构中包含两个本振,即:第一本振6061和第二本振6063,包括两类混频器,即:第一混频器6041和第二混频器6042,其中第一本振6061为所有的第一天线A1支路的第一混频器6041提供本振,第二本振6063为所有的第二天线A2支路的第二混频器6042提供本振,负载模块607用于吸收所述第一本振和第二本振提供本振后剩余的能量,两个本振工作频率不同,分别以w1,w2频率工作,与以w0工作的串馈移相信号分别混频后得到频率为w0+w1的第一变频信号经A1天线辐射,频率为w0+w2的第二变频信号经A2天线辐射,由于频率为w0的串馈移相信
号经过了相位控制,因此经混频过后的第一变频信号以及第二变频信号也经过相位控制,因此经A1、A2天线阵辐射后就能得到特定的天线波束指向,并且通过调节移相器6032的移相值可以随意控制天线的波束指向。同样第一本振6061、第二本振6063经第二耦合器6062到达各第一混频器6041及第二混频器6042时应保证等幅同相或者具有等幅以及确定的相位关系。
以第一频段工作为例,当发射链路工作时,首先,第一本振6061提供的本振信号从左到右依次经过各第二耦合器6062到达各A1天线的第一混频器6041处提供本振,该第一本振6061提供的本振包括等幅同相或者等幅以及具有确定的相位关系;当开关连通左侧,中频信号从左到右依次经过第一耦合器6031和移相器6032,到达A1天线上,得到第一串馈移相信号,到达A11天线上的第一串馈移相信号为a cos w0t,A12天线上的第一串馈移相信号为a cos(w0t+φ),到达A1n天线上的第一串馈移相信号为a cos[w0t+(n-1)φ],第一串馈移相信号分别与第一混频器6041混频得到第一变频信号,在A11天线上的第一变频信号为A12天线上的第一变频信号为A1n天线上的第一变频信号为此时相控阵将以ω0+ω1频率工作,并且各相邻第一天线的支路之间也存在固定的相位差φ,通过控制移相器6032的移相值φ进而控制天线波束指向。
当接收链路工作时,当开关602连通左侧,阵列天线605接收第一变频信号,各级第一混频器6041与第一变频信号进行混频,变频为第一串馈移相信号,所述第一串馈移相信号记作a cos[w0t+(n-1)φ],移相模块603用于通过所述第一耦合器6031将所述第一串馈移相信号耦合到所述移相模块603上,在所述移相模块603上得到所述中频信号,然后,调频模块601将该中频信号调频为基带信号。
以第二频段工作为例,当发射链路工作时,首先,第二本振6063提供的本振信号从左到右依次经过各第二耦合器6062到达各A2天线的第二混频器6042处提供本振,当开关连通右侧,中频信号从左到右依次经过第一耦合器6031和移相器6032,到达A2天线上,得到第二串馈移相信号,到达A21天线上的第二串馈移相信号为a cos w0t,在A21天线上的第一混频器信号为c cos w2t,经混频之后得到的第二变频信号记作A22天线上的第二串馈移相信号为a cos(w0t+φ),与第二混频器6042混频之后得到的第二变频信号记作同理达A2m天线上的第二串馈移相信号为a cos[w2t+(m-1)φ],与第二混频器6042混频得到第二变频信号为此时相控阵将以ω0+ω2频率工作,并且各相邻第二天线的支路之间也存在固定的相位差φ,通过控制移相器6032的移相值φ进而控制天线波束指向。
当接收链路工作时,即信号从阵列天线605发射到调频模块601,接收链路与发射链路原理相同,只是信号方向相反。当开关602连通右侧,阵列天线605接收第二变频信号,各级第二混频器6042与第二变频信号进行混频,变频为第二串馈移相信号,所述第二串馈移相信号记作a cos[w0t+(m-1)φ],移相模块603用于通过所述第一耦合器6031将所述第二串馈移相信号耦合到所述移相模块603上,在所述移相模块603上得到所述中频信号,然后,调频模块601将该中频信号调频为基带信号。
综上所述,通过调频模块进行基带信号与中频信号之间的调频,通过移相模块进行中频信号与串馈移相信号之间的串馈移相,其中,移相模块包括第一耦合器和移相器,第一耦合器和移相器分别用于中频信号与串馈移相信号之间
的定向耦合与移相,通过第一耦合器和移相器串馈移相实现双频,而第一耦合器与移相器串联共用***资源,有效的节省了***资源。
在上述实施例中,对各个实施例的描述都各有侧重,某个实施例中没有详述的部分,可以参见其他实施例的相关描述。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的***,装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的***,装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个***,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本发明各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。
集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本发明各个实施例方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(ROM,Read-Only Memory)、随机
存取存储器(RAM,Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
Claims (14)
- 一种双频相控阵,其特征在于,包括:调频模块、与所述调频模块连接的移相模块;所述调频模块用于基带信号与中频信号之间的调频;所述移相模块用于所述中频信号与串馈移相信号之间的串馈移相,所述移相模块包括第一耦合器和移相器,所述第一耦合器与所述移相器串联,所述第一耦合器用于所述中频信号与所述串馈移相信号之间的定向耦合,所述移相器用于所述中频信号与所述串馈移相信号之间的移相;其中,所述移相模块与所述调频模块之间设置有开关,所述开关包括第一端和第二端,所述第一端用于控制所述双频相控阵的第一频段,所述第二端用于控制所述双频相控阵的第二频段。
- 根据权利要求1所述的双频相控阵架构,其特征在于,所述双频相控阵还包括:与所述移相模块连接的阵列天线,所述阵列天线包括第一天线和第二天线;所述第一天线用于当所述开关的第一端连通时,辐射所述第一频段对应的信号;所述第二天线用于当所述开关的第二端连通时,辐射所述第二频段对应的信号。
- 根据权利要求2所述的双频相控阵,其特征在于,所述双频相控阵还包括:与所述移相模块与所述阵列天线连接的变频模块、与所述变频模块连接的本振模块;所述本振模块用于为所述变频模块提供本振,使得所述变频模块进行所述串馈移相信号与变频信号之间的变频。
- 根据权利要求3所述的双频相控阵,其特征在于,所述串馈移相信号包括第一串馈移相信号和第二串馈移相信号,所述变频信号包括第一变频信号,所述第一串馈信号和所述第一变频信号位于所述第一天线上,所述第二串馈信号位于所述第二天线上;所述变频模块包括第一混频器;所述本振模块包括第一本振,所述第一本振用于为所述第一混频器提供第 一本振幅度以及第一本振频率,使得所述第一混频器进行所述第一串馈移相信号与所述第一变频信号之间的混频。
- 根据权利要求4所述的双频相控阵,其特征在于,当所述中频信号预转换成所述第一变频信号时,所述开关的第一端连通,所述移相模块用于将所述中频信号从所述移相模块的第一端依次经过所述第一耦合器和所述移相器,所述第一耦合器将部分所述中频信号直接耦合到所述第一天线上,所述移相器将所述第一耦合器未直接耦合到所述第一天线上的剩余中频信号移相到所述第一耦合器,从而通过所述第一耦合器耦合到所述第一天线上,得到所述第一串馈移相信号,所述第一串馈移相信号记作acos[w0t+(n-1)φ],其中,a为所述调频模块的幅度,w0为所述调频模块的频率,φ为所述移相器提供的相位差,t为时间变量,n为所述第一天线的支路个数;
- 根据权利要求5所述的双频相控阵,其特征在于,当所述中频信号预转换成所述第二串馈移相信号时,所述开关的第二端连通,所述移相模块用于将所述中频信号从所述移相模块的第二端依次经过所述第一耦合器和所述移相器,所述第一耦合器将部分所述中频信号直接耦合到所述第二天线上,所述移相器将所述第一耦合器未直接耦合到所述第二天线上的剩余中频信号移相到所述第一耦合器,从而通过所述第一耦合器耦合到所述第二天线上,得到所述第二串馈移相信号,所述第二串馈移相信号记作acos[w0t+(m-1)φ],m为所述第二天线的支路个数。
- 根据权利要求5所述的双频相控阵,其特征在于,所述本振模块还包括:第二本振;所述变频信号还包括第二变频信号,所述第二变频信号位于所述第二天线上;所述变频模块还包括第二混频器;所述第二本振用于为所述第二混频器提供第二本振幅度以及第二本振频 率,以使得所述第二混频器进行所述第二串馈移相信号与所述第二变频信号之间的混频。
- 根据权利要求5所述的双频相控阵,其特征在于,当所述第一变频信号预转换成所述中频信号时,所述开关的第一端连通,所述变频模块用于通过所述第一混频器将所述第一变频信号进行混频,变频为所述第一串馈移相信号,所述第一串馈移相信号记作acos[w0t+(n-1)φ];所述移相模块用于通过所述第一耦合器将所述第一串馈移相信号耦合到所述移相模块上,在所述移相模块上得到所述中频信号。
- 根据权利要求9所述的双频相控阵,其特征在于,当所述第二变频信号预转换成所述第二串馈移相信号时,所述开关的第二端连通,所述变频模块用于通过所述第二混频器将所述第二变频信号进行混频,变频为所述第二串馈移相信号,所述第二串馈移相信号记作acos[w0t+(m-1)φ]。
- 根据权利要求10所述的双频相控阵,其特征在于,当所述第二串馈移相信号预转换成所述中频信号时,所述开关的第二端连通,所述移相模块用于通过所述第一耦合器将所述第二串馈移相信号耦合到所述移相模块上,在所述移相模块上得到所述中频信号。
- 根据权利要求3所述的双频相控阵,其特征在于,所述双频相控阵还包括:与所述本振模块连接的负载模块;所述负载模块用于吸收所述本振模块提供本振后剩余的能量。
- 根据权利要求3所述的双频相控阵,其特征在于,所述变频模块还包括:与所述本振模块连接的第二耦合器;所述第二耦合器用于确保所述本振模块为所述变频模块提供恒定的本振。
- 根据权利要求1至13任一项所述的双频相控阵,其特征在于,所述双频相控阵还包括:与所述移相模块连接的控制模块;所述控制模块用于通过调节所述移相器的相位差控制所述阵列天线的波 束指向。
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EP3211807B1 (en) | 2020-03-25 |
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CN107615678B (zh) | 2020-11-27 |
EP3211807A1 (en) | 2017-08-30 |
EP3211807A4 (en) | 2018-02-21 |
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