CN212341452U - Phased array weather radar and transceiving module thereof - Google Patents
Phased array weather radar and transceiving module thereof Download PDFInfo
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- CN212341452U CN212341452U CN202020925031.9U CN202020925031U CN212341452U CN 212341452 U CN212341452 U CN 212341452U CN 202020925031 U CN202020925031 U CN 202020925031U CN 212341452 U CN212341452 U CN 212341452U
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Abstract
The application provides a phased array weather radar and transceiver module thereof, transceiver module includes: according to the signal transmission direction, the transmitting channel comprises the following components which are connected in sequence: a plurality of isolation elements, a first single stage power amplifier, a phase shifter, a multi-stage power amplifier, and a first filter; the receiving channel comprises the following components which are connected in sequence: the low-noise amplifier comprises a limiter, a low-noise amplifier, a second filter, a second single-stage power amplifier, a first mixing element, a low-pass filter and a third single-stage power amplifier; by the structure, radio frequency input and intermediate frequency output are realized; the radio frequency signal has the characteristics of extremely low phase noise and less spurious. And output intermediate frequency signal can directly be sampled by ADC to need not to set up these units such as analog signal mixing component, filtering unit behind transceiver module bulky, the expensive unit of cost, make transceiver module miniaturization, phased array weather radar's volume is less, and the cost is lower.
Description
Technical Field
The utility model relates to an electromagnetic wave technical field especially relates to a phased array weather radar and transceiver module thereof.
Background
The transceiver module is a part between the transmitting signal and the receiving signal and the antenna in a wireless transceiver system, namely one end of the transceiver module is connected with the antenna, and the other end of the transceiver module is connected with the transmitting excitation signal and the signal processing unit. Phased array radars typically have tens to hundreds or even more transmit and receive channels, whereas conventional radars have only one transmit and one receive channel.
In addition, the traditional radar is composed of a transmitter and a receiver, and the transmitting power is high, so that the size of a transmitting-receiving channel is large. However, the phased array radar has too many transmit-receive channels, and if the phased array radar is designed according to the traditional radar concept, the phased array radar has an unusually large volume and good performance, but cannot accept huge cost and large volume. The energy of a single transmitting channel of a general phased array is far lower than that of a traditional radar, so that a miniaturized and intensified transmitting-receiving channel, namely a transmitting-receiving module, can be designed.
The functions to be performed by the transceiver module of a phased array radar can be explained in detail as follows: the radio frequency carrier signal with enough power is provided for the antenna for transmitting (the antenna radiates energy to space), and the received radio frequency echo signal from the antenna is amplified and then is processed by the back-end signal processing unit.
However, since the transceiver module needs to process the radio frequency echo signal by the back-end signal processing unit, the phased array radar has more transceiver channels, which results in a larger size of the back-end signal processing unit and high cost.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a phased array weather radar and transceiver module thereof to phased array radar transceiver channel is more among the solution prior art, leads to rear end signal processing unit's volume great, problem that the cost is expensive.
In order to achieve the above object, the utility model provides a following technical scheme:
a phased array weather radar transceiver module comprising:
a transmit channel and a receive channel, and a port connection element;
the port connection element comprises at least a first end, a second end and a third end;
wherein, according to signal transmission direction, the transmission channel includes consecutive: a plurality of isolation elements, a first single stage power amplifier, a phase shifter, a multi-stage power amplifier, and a first filter;
the receiving channel comprises the following components which are connected in sequence: the low-noise amplifier comprises a limiter, a low-noise amplifier, a second filter, a second single-stage power amplifier, a first mixing element, a low-pass filter and a third single-stage power amplifier;
the first filter is connected with the first end of the port connecting element; the limiter is connected with the second end of the port connecting element, and the third end of the port connecting element is used for being connected with an antenna.
Preferably, the isolation element is a single pole single throw switch.
Preferably, the number of the single-pole single-throw switches is three.
Preferably, it may further include, between the first mixing element and the low pass filter:
and the third filter, the fourth single-stage power amplifier and the second mixing element are connected in sequence along the signal transmission direction.
Preferably, the first mixing element and the second mixing element are both mixers.
Preferably, the port connection element is a circulator.
Preferably, the power amplifier further comprises a coupling detector connected to the circulator for detecting whether the power of the transmission signal on the transmission path is abnormal.
The utility model also provides a phased array weather radar, including being a plurality of transceiver modules that the array was arranged, transceiver module is above arbitrary one phased array weather radar transceiver module.
Preferably, each of said transceiver modules is fabricated separately on a form factor.
Preferably, a plurality of said transceiver modules are fabricated on a form factor.
According to the above technical solution, the transceiver module provided by the present invention comprises: a transmit channel and a receive channel, and a port connection element; the port connection element comprises at least a first end, a second end and a third end; wherein, according to signal transmission direction, the transmission channel includes consecutive: a plurality of isolation elements, a first single stage power amplifier, a phase shifter, a multi-stage power amplifier, and a first filter; the receiving channel comprises the following components which are connected in sequence: the low-noise amplifier comprises a limiter, a low-noise amplifier, a second filter, a second single-stage power amplifier, a first mixing element, a low-pass filter and a third single-stage power amplifier; the first filter is connected with the first end of the port connecting element; the limiter is connected with the second end of the port connecting element, and the third end of the port connecting element is used for being connected with an antenna.
Through the structure, the radio frequency input RFin and the medium frequency output IFout are realized; the radio frequency signal generated by the crystal oscillator and the analog means is used as an input signal, and has the characteristics of extremely low phase noise and less stray. And output intermediate frequency signal can directly be sampled by the ADC to need not to set up these units such as analog signal mixing component, filtering unit behind transceiver module bulky, the expensive unit of cost, also, the utility model provides a transceiver module has miniaturized characteristics, and the volume of the phased array weather radar that provides is less, the lower advantage of cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 shows four theoretical implementations of the transceiver module provided by the present invention;
fig. 2 is a schematic diagram of a transceiver module according to a first theoretical scheme of the transceiver module of the present invention;
fig. 3 is a schematic structural diagram of a phased array weather radar transceiver module provided in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another phased array weather radar transceiver module provided in an embodiment of the present invention;
fig. 5 is a schematic top view of an integrated external structure of a 4-way transceiver module according to an embodiment of the present invention;
fig. 6 is a schematic side view of an integrated 4-way transceiver module according to an embodiment of the present invention.
Detailed Description
As described in the background section, in the prior art, after the transceiver module of the phased array weather radar receives the radio frequency echo signal, the transceiver module needs to process the radio frequency echo signal by using the back-end signal processing unit, which results in a large volume of the back-end signal processing unit and high cost.
The inventor provides that a transceiver module of the S-band phased array weather radar has four design schemes shown in fig. 1 in theory based on a macroscopic principle, but a radar crystal oscillator (signal origin) under the technical bottleneck at present is an intermediate frequency signal, and a signal sampled by an ADC (Analog-to-digital converter) is also the intermediate frequency signal; and the signals transmitted and received by the antenna are radio frequency signals (the antenna is bidirectional, namely, the signals can be transmitted and received) RFin/out. The current state of the art is not capable of converting RF signals with frequencies above 2.7GHz directly into digital signals by ADCs with quantization capability above 16-bit!
In the prior art, the source of the transmitted signal is a digital signal, which is typically an intermediate frequency signal generated by direct digital frequency synthesis (DDS) or digital-to-analog converter (DAC); in the receiving chain, an analog-to-digital converter (ADC) samples and processes intermediate frequency signals. Therefore, if the signals in the intermediate frequency form are used for transmitting and receiving, the method is direct and convenient. Therefore, the transceiver module is most preferably an intermediate frequency input IFin and an intermediate frequency output IFout.
However, the transceiver module adopting the intermediate frequency input IFin is limited by technical reasons, and needs to be processed by intermediate frequency-to-radio frequency conversion, phase shifting, filtering and the like, and the quality of radio frequency signals transmitted to an antenna after processing is not good, for example, the phase noise is high, the frequency stray is large, and the like, and the requirement of a weather radar on high-index transmission signals cannot be met. Therefore, the transceiver module is usually provided with a radio frequency signal as an input RFin, which is then amplified and phase-shifted to an antenna, which radiates the signal to space.
And because the weather radar has high requirements on the quality of the transmitted radio frequency signals: the targets measured by the weather radar are cloud, rain, sky, wind, etc.; while others measure moving targets such as airborne aircraft. Therefore, the observation object measured by the weather radar is a target of other radars as the background, that is, the weather radar extracts useful signals in the background of other radars, and therefore, the weather radar has higher requirements on the quality of the transmitted signals. Therefore, the schemes two and four are not suitable for weather radars at present although the schemes may be suitable for other radars.
In the field of weather radars, after the second and fourth schemes are eliminated, in the prior art, the transceiving signals of the transceiving module of a general phased array radar are all radio Frequency signals, that is, a radio Frequency input signal rfin (radio Frequency input) is transmitted to an antenna, an echo radio Frequency signal received by the antenna is received and amplified and then output as an output signal rfout (radio Frequency output) for a rear end to perform mixing down conversion, amplification and ADC (analog-to-digital converter) conversion to a digital signal.
That is, in the prior art, a first scheme is generally adopted, and a specific implementation functional block diagram of the first scheme is shown in fig. 2, a radio frequency signal is used as an input of a transceiver module, the phase of the input signal is shifted through a phase shifter, the amplitude of the input signal is adjusted through an attenuator, the input signal is selected through a transceiver switch, an upper path in fig. 2 is selected to enter a power amplifier for amplification, and finally the input signal is output to an antenna through a circulator and radiated to a space through the antenna. During receiving, the antenna makes the echo signal enter the lower path in fig. 2 through the circulator, limits amplitude protection, then enters the low noise amplifier for amplification, then is selected by the receiving and transmitting switch, and finally obtains a signal to be processed through the attenuator and the phase shifter, so that receiving of the receiving and transmitting module is completed.
However, in the radar system, the reception output of the transceiver module is not an end point, and only a signal that can be processed by the ADC is received in a signal form expected by the reception path. Therefore, in the first scheme, the output received by the transceiver module also needs to be subjected to frequency mixing and filtering of analog signals, and is reduced to intermediate frequency signals, wherein the intermediate frequency signals are signals which can be directly sampled by an ADC.
Then, on the basis of the first scheme, the signal received by the transceiver module is processed to become an intermediate frequency signal that can be sampled by the ADC, that is, the third scheme. Therefore, the phased array weather radar with hundreds of transceiving channels does not need to adopt the first scheme, and analog signal mixing elements, filtering units and the like behind the transceiving module of the first scheme can be reduced, and the units are large in size and expensive in manufacturing cost.
Based on this, the utility model provides a phased array weather radar transceiver module, include:
a transmit channel and a receive channel, and a port connection element;
the port connection element comprises at least a first end, a second end and a third end;
wherein, according to signal transmission direction, the transmission channel includes consecutive: a plurality of isolation elements, a first single stage power amplifier, a phase shifter, a multi-stage power amplifier, and a first filter;
the receiving channel comprises the following components which are connected in sequence: the low-noise amplifier comprises a limiter, a low-noise amplifier, a second filter, a second single-stage power amplifier, a first mixing element, a low-pass filter and a third single-stage power amplifier;
the first filter is connected with the first end of the port connecting element; the limiter is connected with the second end of the port connecting element, and the third end of the port connecting element is used for being connected with an antenna.
Because the utility model provides a transceiver module, realized radio frequency input RFin and medium frequency output IFout; the radio frequency signal generated by the crystal oscillator and the analog means is used as an input signal, and has the characteristics of extremely low phase noise and less stray. And output intermediate frequency signal can directly be sampled by the ADC to need not to set up these units such as analog signal mixing component, filtering unit behind transceiver module bulky, the expensive unit of cost, also, the utility model provides a transceiver module has miniaturized characteristics, and the volume of the phased array weather radar that provides is less, the lower advantage of cost.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a phased array weather radar transceiver module, this phased array weather radar transceiver module work at the S wave band, the embodiment of the utility model provides an in S wave band frequency range be 2.0GHz ~ 4.0GHz, the utility model discloses in phased array weather radar' S operating frequency is 2.7GHz ~ 3.0 GHz. It should be noted that, the single channel of the phased array transceiver module provided in the embodiment of the present invention is only dozens to one hundred watts, but the phased array has hundreds of transmitting channels and receiving channels, so that the total power of the phased array weather radar is dozens of kilowatts. The structure of a single phased array transceiver module is described below as an example.
Please refer to fig. 3, fig. 3 is a schematic diagram of a phased array weather radar transceiver module according to the present invention. The transceiver module includes: a transmit channel T and a receive channel R, and a port connection element O; the port connection element O comprises at least a first end, a second end and a third end; wherein, according to signal transmission direction, transmission channel T includes consecutive: a plurality of isolation elements T1, a first single-stage power amplifier T2, a phase shifter T3, a multi-stage power amplifier T4, and a first filter T5; the receiving channel R comprises the following components which are connected in sequence: a limiter R1, a low noise amplifier R2, a second filter R3, a second single stage power amplifier R4, a first mixing element R5, a low pass filter R6, and a third single stage power amplifier R7; the first filter T5 is connected to a first end of the port connection element O; the limiter R1 is connected to a second terminal of the port connection element O, and a third terminal of the port connection element O is used for connecting to an antenna.
In this embodiment, the specific implementation manner of the isolation element is not limited, and optionally, the isolation element may be a single-pole single-throw switch or an isolator. It should be noted that, usually, the isolation of a single-pole single-throw switch is above 40dB, while the isolation of the isolator is less than 20dB, and the single-pole single-throw switch does not bring about any deterioration of other index parameters such as increase of insertion loss and increase of standing wave ratio with respect to the isolator. Therefore, in this embodiment, the isolation element is a single-pole single-throw switch. In this embodiment, the specific number of the single-pole single-throw switches is not limited, and may be set according to actual requirements, and optionally, in this embodiment, in order to make the isolation degree reach more than 100dB, the number of the single-pole single-throw switches may be 3.
After the single-pole single-throw switches in the transmitting channel are connected in series, the transmitting channel and the receiving channel of the transmitting and receiving module can be isolated, and the transmitting and receiving modules are integrated in a structural body, so that the isolation degree of at least 80dB and even more than 100dB is realized. The first single-stage power amplifier realizes single-stage amplification of a power signal; the multistage power amplifier amplifies power signals in multiple stages, and all the power signals have amplification effects; the phase shifter is used for carrying out phase shift on the radio frequency signal; the first filter is used for filtering out frequencies except the target frequency and reducing clutter.
The amplitude limiter of the receiving path is used for limiting the power of the echo signal, and when the power of the echo signal received by the transceiver module is larger, the amplitude limiter plays a role in protecting a post-stage circuit; because the echo signals received by the antenna are very weak, an amplifier with very low noise is needed to amplify and extract the echo signals; if a common amplifier is selected, noise and signals are amplified simultaneously, and weak echo signals cannot be extracted, and the noise coefficient of the low-noise amplifier in the embodiment is less than 0.6 dB. And the second filter and the third filter adopt band-pass filters to filter frequency signals except the useful signals. The second single-stage power amplifier and the third single-stage power amplifier and the fourth single-stage power amplifier are also used for amplifying the lower signal amplitude to a usable amplitude.
It should be noted that, in the above embodiment, the receiving channel only includes a structure formed by a mixing element and a filter, and the first down-conversion is implemented, and in order to ensure that the finally obtained intermediate frequency signal can be sampled and processed by the ADC, the embodiment may further include a second-stage mixing structure, so that the intermediate frequency signal is controlled below 400MHz, which is convenient for 16-bit ADC sampling. As shown in fig. 4, a schematic structural diagram of another phased array weather radar transceiver module provided in the embodiment of the present invention is different from that shown in fig. 3, in this embodiment, a first mixing element and the low pass filter may further include: and the third filter R8, the fourth single-stage power amplifier R9 and the second mixing element R10 are connected in sequence along the signal transmission direction.
In this embodiment, specific structures of the first frequency mixing element and the second frequency mixing element are not limited, and optionally, in this embodiment, the first frequency mixing element and the second frequency mixing element are both implemented by using a frequency mixer. The first and second mixing elements function to: multiplying the radio frequency signal by the local oscillator signal to obtain a plurality of frequency components, and then filtering out the unnecessary frequency components by the filter to obtain the frequency signal required by the system. Because the frequency of the intermediate frequency signal is about 100MHz and is much lower than that of the radio frequency signal, the low-pass filter is adopted, the radio frequency signal with relatively high frequency can be filtered, and better frequency characteristic is realized.
The embodiment of the utility model provides an in the receiving path who provides adopts the mode of secondary down conversion and multiple filtering, finally obtains intermediate frequency output signal.
The operation principle of the transceiver module provided in the embodiment of the present invention is described below with reference to the structure shown in fig. 4, wherein the input radio frequency signal RFin (2.7 GHz-3.0 GHz) passes through at least two single-pole single-throw switches and then passes through a single-stage power amplifier, and after amplification, the phase of the input radio frequency signal RFin is shifted through the phase shifter, then the input radio frequency signal RFin is amplified in multiple stages and then passes through a first filter, and finally the input radio frequency signal passes through the circulator and then outputs radio frequency signal (2.7 GHz-3.0 GHz), and finally the input radio frequency signal RFin is radiated.
The echo signal received by the antenna is a radio frequency signal (2.7 GHz-3.0 GHz), the radio frequency signal passes through the circulator, then sequentially passes through the amplitude limiter, the low noise amplifier, the second filter and the second single-stage power amplifier, then is mixed with a Local Oscillator LO1(Local Oscillator), after being filtered, a primary down-conversion signal is obtained, then is amplified and is mixed with a Local Oscillator LO2 for the second time, and is subjected to low-pass filtering, a secondary down-conversion signal is obtained, at this time, the intermediate frequency signal is an intermediate frequency signal IFout, the frequency range is 80 MHz-120 MHz, and finally the intermediate frequency signal is amplified and output.
The weather radar works at a certain point frequency of 2.7 GHz-3.0GHz, and the received signal bandwidth is within 40MHz, namely the weather radar is a narrow-band signal receiving system, so that the bandwidth of a filter in a transceiving channel does not need to be particularly wide, and the interference signal is easily filtered.
In addition, it should be noted that the transceiver module in the embodiment of the present invention may further include a coupling detector J, where the coupling detector J performs coupling detection at the circulator to obtain the transmission power signal monitoring, that is, the coupling detector J is used to detect whether the power of the transmission signal is abnormal, that is, when the transmission path is damaged or the power is reduced due to performance degradation, this part may perform alarm monitoring. The embodiment of the utility model provides a transceiver module, transmission path input signal power 0dBm, the minimum 100W of output signal power belongs to high-power transceiver module, and the volume size is little.
About the embodiment of the utility model provides an explanation of radio frequency signal and mixing frequency conversion to intermediate frequency signal:
examples of frequency conversion of the rf signal from 2.7GHz to 3.0GHz to an intermediate frequency are LO 1: 3.51 GHz-3.81 GHz, LO 2: 900MHz, the intermediate frequency signal is 90 MHz. The calculation method is as follows:
when receiving an echo signal with the frequency of 2.7GHz, the radio frequency signal with the frequency of 2.7GHz is mixed with the local oscillator signal LO1 with the frequency of 3.51GHz of the first mixing element, and only the following signals are retained after filtering: and 3.51GHz-2.7GHz, 0.81GHz 810MHz, and then mixing, that is, the filtered signal 810MHz is mixed with the local oscillator signal LO2 with the frequency of 900MHz of the second mixing element, and only the following signals are retained after filtering: and (5) changing 900MHz-810MHz into 90MHz, namely obtaining an intermediate frequency 90MHz signal.
Similarly, when receiving the echo signal with the frequency of 3.0GHz, the radio frequency signal with the frequency of 3.0GHz is mixed with the local oscillator signal LO1 with the frequency of 3.81GHz of the first mixing element, and only the following signals are retained after filtering: 3.81GHz-3.0GHz 0.81GHz 810MHz, and then mix, that is, the filtered signal 810MHz mixes with 900MHz of the local oscillator signal LO2 of the second mixing element, and only the following signals are retained after filtering: and the 900MHz-810MHz is 90MHz, and an intermediate frequency 90MHz signal is obtained.
The weather radar works at a certain dot frequency of 2.7-3.0 GHz, after the radar dot frequency is determined, the LO1 also determines the dot frequency value, and the corresponding frequency difference between the LO1 and the radio frequency signal (2.7-3.0 GHz) of the weather radar is 810 MHz.
The embodiment of the utility model provides a transceiver module has following characteristics:
1) transmit receiving module's transmission route adopts the single-pole single-throw switch of a plurality of series connections, can play the effect that increases the isolation, and the isolation more than 40dB can be realized to a single-pole single-throw switch usually, the embodiment of the utility model provides an in, through a plurality of single-pole single-throw switches, can realize that a plurality of cascades isolation adds.
2) The receiving channel of the transceiver module adopts two-stage mixing and multi-stage filter series connection, changes the radio frequency signal amplified by the low noise amplifier into an intermediate frequency signal, and the multi-stage filter filters frequency components outside the signal bandwidth. The mixer in this scheme may be replaced when other components that can perform the mixing function are used. In the scheme, the frequency mixing and the filter are combined, because the frequency mixing generates a plurality of frequency components, only the filtering can select a part of the frequency components, and therefore, the filter of the receiving path cannot be removed.
Because the utility model provides a transceiver module, realized radio frequency input RFin and medium frequency output IFout; the radio frequency signal generated by the crystal oscillator and the analog means is used as an input signal, and has the characteristics of extremely low phase noise and less stray. And output intermediate frequency signal can directly be sampled by the ADC to need not to set up these units such as analog signal mixing component, filtering unit behind transceiver module bulky, the expensive unit of cost, also, the utility model provides a transceiver module has miniaturized characteristics, and the volume of the phased array weather radar that provides is less, the lower advantage of cost.
Based on the same utility model discloses think, the utility model discloses still provide a phased array weather radar in another embodiment, including being a plurality of transceiver modules that the array was arranged, transceiver module be above the embodiment phased array weather radar transceiver module.
The embodiment of the utility model provides an in, do not restrict transceiver module's preparation appearance, can make alone on an appearance structure for every transceiver module, also can be with 2 ways, 4 ways or more transceiver module preparation on an appearance structure to integrated multichannel transceiver module. As shown in fig. 5 and fig. 6, an overall structure of the 4-channel transceiver module provided in the embodiment of the present invention is schematically shown, wherein fig. 5 is a schematic plan view of the overall structure of the 4-channel transceiver module provided in the embodiment of the present invention; fig. 6 is a schematic side view of an integrated 4-way transceiver module according to an embodiment of the present invention. The dimensions of the form construction are 157mm x 130mm x 32 mm. 4 RFin/out interfaces and 4 IFout interfaces in the appearance structure represent 4 transceiving channels; 1 RFin, the power divider in the assembly, equal power 1 divides 4 to satisfy one four way send and receive channel: 4 rfins, 4 IFout and 4 RFin/out.
Utilize the embodiment of the utility model provides a phased array weather radar transceiver module can make phased array weather radar need not follow-up radio frequency signal and changes the various units of intermediate frequency signal, consequently, can reduce phased array weather radar's volume and cost.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in an article or device that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A phased array weather radar transceiver module, comprising:
a transmit channel and a receive channel, and a port connection element;
the port connection element comprises at least a first end, a second end and a third end;
wherein, according to signal transmission direction, the transmission channel includes consecutive: a plurality of isolation elements, a first single stage power amplifier, a phase shifter, a multi-stage power amplifier, and a first filter;
the receiving channel comprises the following components which are connected in sequence: the low-noise amplifier comprises a limiter, a low-noise amplifier, a second filter, a second single-stage power amplifier, a first mixing element, a low-pass filter and a third single-stage power amplifier;
the first filter is connected with the first end of the port connecting element; the limiter is connected with the second end of the port connecting element, and the third end of the port connecting element is used for being connected with an antenna.
2. The phased array weather radar transceiver module as claimed in claim 1, wherein the isolation element is a single pole, single throw switch.
3. The phased array weather radar transceiver module as claimed in claim 2, wherein the number of single pole, single throw switches is three.
4. The phased array weather radar transceiver module as claimed in claim 1, further comprising between the first mixing element and the low pass filter:
and the third filter, the fourth single-stage power amplifier and the second mixing element are connected in sequence along the signal transmission direction.
5. The phased array weather radar transceiver module as claimed in claim 4, wherein the first mixing element and the second mixing element are each mixers.
6. The phased array weather radar transceiver module as claimed in claim 1, wherein the port connection element is a circulator.
7. The phased array weather radar transceiver module as claimed in claim 6, further comprising a coupler detector coupled to the circulator for detecting whether the power of the transmit signal on the transmit channel is abnormal.
8. A phased array weather radar, comprising a plurality of transceiver modules arranged in an array, wherein the transceiver modules are as claimed in any one of claims 1 to 7.
9. The phased array weather radar of claim 8, wherein each of the transceiver modules is fabricated separately on a form factor.
10. The phased array weather radar of claim 8, wherein a plurality of the transceiver modules are fabricated on a form factor.
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|---|---|---|---|---|
| CN111458713A (en) * | 2020-05-27 | 2020-07-28 | 北京敏视达雷达有限公司 | Phased array weather radar and transceiving module thereof |
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