CN112564723B - Receiving amplifying assembly - Google Patents
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- CN112564723B CN112564723B CN202011228880.XA CN202011228880A CN112564723B CN 112564723 B CN112564723 B CN 112564723B CN 202011228880 A CN202011228880 A CN 202011228880A CN 112564723 B CN112564723 B CN 112564723B
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- 230000010287 polarization Effects 0.000 claims abstract description 58
- 230000003321 amplification Effects 0.000 claims description 30
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 30
- 238000001914 filtration Methods 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 14
- 230000007704 transition Effects 0.000 claims description 6
- 230000002238 attenuated effect Effects 0.000 claims description 5
- 229910002601 GaN Inorganic materials 0.000 claims description 4
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 239000000306 component Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
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Abstract
The invention provides a receiving and amplifying assembly which comprises a first horizontal polarization signal input port, a first vertical polarization signal input port, a second horizontal polarization signal input port, a second vertical polarization signal input port, a first combiner electrically connected with the first horizontal polarization signal input port and the second horizontal polarization signal input port, a first receiving and amplifying link and a first signal output port electrically connected with the first combiner in sequence, a second combiner electrically connected with the first vertical polarization signal input port and the second vertical polarization signal input port, a second receiving and amplifying link and a second signal output port electrically connected with the second combiner in sequence. The invention provides a small-sized receiving amplifying component with low cost and high dynamic range, which can realize the input and output of a receiving channel 4. The vertical interconnection structure is flexibly adopted, the port and transmission line layout is reasonably designed, the circuit sharing of the receiving part is realized by adopting the combiner, and the receiving link adopts a double-switch mode.
Description
Technical Field
The invention relates to the technical field of electric communication, in particular to a receiving amplification assembly.
Background
The receiving antenna has a larger field of view and a wider frequency band, can realize effective detection of most transmitting devices in a detection range, and a receiving amplification component positioned at the front end of the receiving antenna is one of core components of the receiving antenna, an input port of the receiving amplification component is connected with a receiving antenna array surface, and an output port of the receiving amplification component is connected with a channel, thereby playing a key role in starting and stopping. The functions of receiving synthesis, filtering, amplification and the like of the receiving antenna are realized. The receiving and amplifying assembly is in a key position in the receiving antenna, and plays a decisive role in the performance of the whole receiving antenna.
Disclosure of Invention
The invention provides a receiving amplifying component which is miniaturized, has low cost and high dynamic range and can realize the input and output of a receiving channel 4, and the like, aiming at solving the defects of large volume, high cost, small dynamic range and the like of the receiving amplifying component. The invention flexibly adopts a vertical interconnection structure, reasonably designs the layout of ports and transmission lines, adopts the combiner to realize the circuit sharing of a receiving part, adopts a double-switch mode for a receiving link, and realizes the high dynamic range, high reliability and miniaturization of the receiving amplification component by the measures.
The invention provides a receiving and amplifying assembly, which comprises a first horizontal polarization signal input port, a first vertical polarization signal input port, a second horizontal polarization signal input port, a second vertical polarization signal input port, a first combiner electrically connected with the first horizontal polarization signal input port and the second horizontal polarization signal input port, a first receiving and amplifying link and a first signal output port electrically connected with the first combiner in turn, a second combiner electrically connected with the first vertical polarization signal input port and the second vertical polarization signal input port, a second receiving and amplifying link and a second signal output port electrically connected with the second combiner in turn, wherein the first horizontal polarization signal input port, the first vertical polarization signal input port, the second horizontal polarization signal input port, the second vertical polarization signal input port and the second combiner are arranged in turn;
the first signal output port is used for outputting horizontal polarization signals, and the second signal output port is used for outputting vertical polarization signals;
and a circuit electrically connected with the first combiner through the first horizontal polarization signal input port and the second horizontal polarization signal input port and a circuit electrically connected with the first vertical polarization signal input port and the second combiner are in vertical transition. Circuits electrically connected with the first vertical polarization signal input port and the second combiner are positioned on the surface, and the circuits electrically connected with the first horizontal polarization signal input port and the second horizontal polarization signal input port and the first combiner are arranged downwards through strip lines in the board through a vertical transition technology to avoid signal crossing;
the receiving and amplifying assembly provided by the invention is preferably arranged in a way that the first receiving and amplifying link comprises a first filter electrically connected with the first combiner, a first radio frequency switch, a first attenuator, a second radio frequency switch, a first amplitude limiter electrically connected with the first radio frequency switch, and a first low noise amplifier, wherein one end of the first low noise amplifier is electrically connected with the first amplitude limiter, the other end of the first low noise amplifier is electrically connected with the second radio frequency switch, and the second radio frequency switch is electrically connected with the first signal output port.
As a preferred mode, the second receiving and amplifying link includes a second filter electrically connected to the second combiner, a third rf switch, a second limiter, a second low-noise amplifier, a fourth rf switch, and a second attenuator, where one end of the second attenuator is electrically connected to the third rf switch, the other end of the second attenuator is electrically connected to the fourth rf switch, and the fourth rf switch is electrically connected to the second signal output port.
In the receiving amplification assembly, as a preferred mode, the first radio frequency switch, the second radio frequency switch, the third radio frequency switch and the fourth radio frequency switch all adopt power radio frequency switches based on gallium nitride.
In a preferred mode, the first horizontally polarized signal input port, the first vertically polarized signal input port, the second horizontally polarized signal input port, the second vertically polarized signal input port, the first signal output port and the second signal output port all adopt direct-insertion interfaces.
The receiving amplification assembly provided by the invention is preferably used in a method comprising the following steps:
s1, when the first horizontally polarized signal input port and/or the second horizontally polarized signal input port has a horizontally polarized signal input, the process proceeds to step S2, and when the first vertically polarized signal input port and/or the second vertically polarized signal input port has a vertically polarized signal input, the process proceeds to step S3;
s2, the horizontal polarization signal enters a first combiner, is combined by a first combiner circuit, then enters a first receiving amplification link, is filtered, attenuated or amplitude-limiting amplified and then is transmitted to a first signal output port for output;
and S3, the vertical polarization signal enters a second combiner, is combined by a second combiner circuit and then enters a second receiving amplification link, and is transmitted to a second signal output port for output after filtering, attenuation or amplitude limiting amplification.
In the receiving and amplifying assembly, as a preferred mode, in the using method step S2, after a horizontally polarized signal enters a first receiving and amplifying link, filtering is performed through a first filter to obtain a first filtered signal, when the first filtered signal is a large signal, a first radio frequency switch and a second radio frequency switch are simultaneously communicated with a first attenuator, and the first filtered signal passes through the first attenuator and is transmitted to a first signal output port; when the first filtering signal is a small signal, the first radio frequency switch is communicated with the first amplitude limiter, the second radio frequency switch is communicated with the first low-noise amplifier, and the first filtering signal is transmitted to the first signal output port for output after being subjected to amplitude limiting amplification by the first amplitude limiter and the first low-noise amplifier;
in the receiving and amplifying assembly according to the present invention, as a preferred mode, in the using method step S3, after the vertical polarization signal enters the second receiving and amplifying link, the vertical polarization signal is filtered by the second filter to obtain a second filtered signal; when the second filtering signal is a small signal, the third radio frequency switch is communicated with the second amplitude limiter, the fourth radio frequency switch is communicated with the second low-noise amplifier, and the second filtering signal is subjected to amplitude limiting amplification by the second amplitude limiter and the second low-noise amplifier and then is transmitted to a second signal output port; when the first filtering signal is a large signal, the third radio frequency switch and the fourth radio frequency switch are simultaneously communicated with the second attenuator, and the second filtering signal is transmitted to the second signal output port for output after passing through the second attenuator.
Wherein, a large signal refers to a signal with a strength greater than-20 dBm.
The invention has the following advantages:
(1) the invention has small volume. The vertical interconnection structure is flexibly and efficiently used for multiple times, and signals are alternately transmitted on the surface and inside of a product, so that the space utilization rate is maximized; all external interfaces of the invention adopt direct-insert connectors. The scheme reduces the thickness of the product to the maximum extent, reduces the size of the whole machine assembly and realizes the miniaturized design.
(2) The invention can realize the receiving channel 4 in and 2 out. The invention is different from the traditional design in that the position of the combiner chip is changed from the rear end to the front end, and the functions of power synthesis, filtering, amplification and the like are firstly carried out, so that the number of chips can be effectively reduced, the chip cost is reduced, the component volume is reduced, the receiving channels with the same polarization share the radio frequency chip circuit, and the chip cost is reduced by 50%. Meanwhile, a dual-channel dual-polarization mode of 4-input and 2-output can provide a dual-polarization anti-interference function for the whole machine.
(3) The invention can realize high dynamic range. The GaN switch with double-switch double-path layout design and high power resistance is adopted, each channel is divided into a large signal branch and a small signal branch, when a small signal is received, a pair of switches are gated, the signal passes through the small signal branch with a low noise amplifier, when a large signal is received, the pair of switches are reversely gated, the signal passes through the large signal branch with an attenuator, and the large signal is transmitted to a receiving channel without being compressed, so that the high dynamic range is realized.
Drawings
FIG. 1 is a schematic block diagram of an embodiment of a receive amplifier module 1-2;
FIG. 2 is a diagram of a signal ingress transmission line layout for an embodiment 1-2 of a receive amplifier module;
FIG. 3 is a flow chart of a method for using an embodiment of a receive amplification module 1-2;
FIG. 4 is a schematic block diagram of an embodiment 2 of a receive amplification assembly;
fig. 5 is a first receive amplification chain layout diagram of a receive amplification assembly.
Reference numerals:
1. a first horizontally polarized signal input port; 2. A first vertically polarized signal input port; 3. A second horizontally polarized signal input port; 4. A second vertically polarized signal input port; 5. A first combiner; 6. A first receive amplification chain; 61. A first filter; 62. A first radio frequency switch; 63. A first attenuator; 64. A second radio frequency switch; 65. A first limiter; 66. A first low noise amplifier; 7. A first signal output port; 8. A second combiner; 9. A second receive amplification chain; 91. A second filter; 92. A third radio frequency switch; 93. A second limiter; 94. A second low noise amplifier; 95. A fourth radio frequency switch; 96. A second attenuator; a. A second signal output port.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
As shown in fig. 1-2, a receiving and amplifying assembly includes a first horizontally polarized signal input port 1, a first vertically polarized signal input port 2, a second horizontally polarized signal input port 3, a second vertically polarized signal input port 4, a first combiner 5 electrically connected to the first horizontally polarized signal input port 1 and the second horizontally polarized signal input port 3, a first receiving and amplifying link 6 and a first signal output port 7 electrically connected to the first combiner 5 in sequence, a second combiner 8 electrically connected to the first vertically polarized signal input port 2 and the second vertically polarized signal input port 4, a second receiving and amplifying link 9 and a second signal output port a electrically connected to the second combiner 8 in sequence; (ii) a
The first signal output port 7 is used for outputting a horizontal polarization signal, and the second signal output port a is used for outputting a vertical polarization signal;
as shown in fig. 2, the circuit electrically connected to the first combiner 5 is vertically transited between the first horizontally polarized signal input port 1 and the second horizontally polarized signal input port 3, and the circuit electrically connected to the first vertically polarized signal input port 2 and the second vertically polarized signal input port 4 and the second combiner 8; the circuits electrically connected with the first vertical polarization signal input port 2, the second vertical polarization signal input port 4 and the second combiner 8 are positioned on the surface, and the circuits electrically connected with the first horizontal polarization signal input port 1, the second horizontal polarization signal input port 3 and the first combiner 5 are arranged downwards through a strip line in the board through a vertical transition technology to avoid signal crossing.
As shown in fig. 3, the method of embodiment 1 includes the steps of:
s1, when there is a horizontally polarized signal input to the first horizontally polarized signal input port 1 and/or the second horizontally polarized signal input port 3, the process proceeds to step S2, and when there is a vertically polarized signal input to the first vertically polarized signal input port 2 and/or the second vertically polarized signal input port 4, the process proceeds to step S3;
s2, the horizontal polarization signal enters the first combiner 5, enters the first receiving and amplifying link 6 after being combined by the first combiner 5 circuit, and is transmitted to the first signal output port 7 for output after being filtered, attenuated or amplitude limiting and amplified;
and S3, the vertical polarization signal enters the second combiner 8, is synthesized by the second combiner 8 circuit, enters the second receiving and amplifying link 9, is filtered, attenuated or amplitude-limiting amplified and then is transmitted to the second signal output port a for output.
Wherein, a large signal refers to a signal with a strength greater than-20 dBm.
Example 2
As shown in fig. 1, a receiving and amplifying assembly includes a first horizontally polarized signal input port 1, a first vertically polarized signal input port 2, a second horizontally polarized signal input port 3, a second vertically polarized signal input port 4, a first combiner 5 electrically connected to the first horizontally polarized signal input port 1 and the second horizontally polarized signal input port 3, a first receiving and amplifying link 6 and a first signal output port 7 electrically connected to the first combiner 5 in sequence, a second combiner 8 electrically connected to the first vertically polarized signal input port 2 and the second vertically polarized signal input port 4, a second receiving and amplifying link 9 and a second signal output port a electrically connected to the second combiner 8 in sequence;
the first signal output port 7 is used for outputting a horizontal polarization signal, and the second signal output port a is used for outputting a vertical polarization signal;
as shown in fig. 2, a circuit electrically connected to the first combiner 5 through the first horizontal polarization signal input port 1 and the second horizontal polarization signal input port 3 and a circuit electrically connected to the first vertical polarization signal input port 2 and the second vertical polarization signal input port 4 and the second combiner 8 are in vertical transition, the circuit electrically connected to the first vertical polarization signal input port 2 and the second vertical polarization signal input port 4 and the second combiner 8 is located on the surface, and the circuit electrically connected to the first horizontal polarization signal input port 1 and the second horizontal polarization signal input port 3 and the first combiner 5 is arranged downward through a strip line inside the board by a vertical transition technique, so as to avoid signal cross;
as shown in fig. 4 and 5, the first receiving and amplifying link 6 includes a first filter 61 electrically connected to the first combiner 5, a first rf switch 62, a first attenuator 63, and a second rf switch 64 electrically connected to the first filter 61 in sequence, a first limiter 65 electrically connected to the first rf switch 62, and a first low noise amplifier 66 having one end electrically connected to the first limiter 65, where the other end of the first low noise amplifier 66 is electrically connected to the second rf switch 64, and the second rf switch 64 is electrically connected to the first signal output port 7.
The second receiving and amplifying link 9 includes a second filter 91 electrically connected to the second combiner 8, a third rf switch 92, a second limiter 93, a second low noise amplifier 94, a fourth rf switch 95 electrically connected to the second filter 91 in sequence, and a second attenuator 96 having one end electrically connected to the third rf switch 92, the other end of the second attenuator 96 electrically connected to the fourth rf switch 95, and the fourth rf switch 95 electrically connected to the second signal output port a;
the first radio frequency switch 62, the second radio frequency switch 64, the third radio frequency switch 92 and the fourth radio frequency switch 95 all adopt power radio frequency switches based on gallium nitride;
the first horizontally polarized signal input port 1, the first vertically polarized signal input port 2, the second horizontally polarized signal input port 3, the second vertically polarized signal input port 4, the first signal output port 7 and the second signal output port a all adopt direct-insert interfaces.
As shown in fig. 3, the method of embodiment 2 includes the following steps:
s1, when there is a horizontally polarized signal input to the first horizontally polarized signal input port 1 and/or the second horizontally polarized signal input port 3, the process proceeds to step S2, and when there is a vertically polarized signal input to the first vertically polarized signal input port 2 and/or the second vertically polarized signal input port 4, the process proceeds to step S3;
s2, enabling the horizontal polarization signal to enter a first combiner 5, and filtering the horizontal polarization signal through a first filter 61 after the horizontal polarization signal is subjected to circuit synthesis through the first combiner 5 to obtain a first filtering signal; when the first filtering signal is a large signal, the first radio frequency switch 63 and the second radio frequency switch 64 are simultaneously communicated with the first attenuator 63, and the first filtering signal passes through the first attenuator 63 and then is transmitted to the first signal output port 7; when the first filtering signal is a small signal, the first radio frequency switch 63 is communicated with the first amplitude limiter 65, the second radio frequency switch 64 is communicated with the first low noise amplifier 66, and the first filtering signal is subjected to amplitude limiting amplification by the first amplitude limiter 65 and the first low noise amplifier 66 and then is transmitted to the first signal output port 7;
s3, the vertical polarization signals are synthesized by the second combiner 8, and then filtered by the second filter 91 to obtain a second filtered signal; when the second filtered signal is a small signal, the third radio frequency switch 92 is communicated with the second amplitude limiter 93, the fourth radio frequency switch 95 is communicated with the second low noise amplifier 94, and the second filtered signal is amplitude-limited and amplified by the second amplitude limiter 93 and the second low noise amplifier 94 and then is transmitted to the second signal output port a; when the first filtered signal is a large signal, the third rf switch 92 and the fourth rf switch 95 are simultaneously connected to the second attenuator 96, and the second filtered signal passes through the second attenuator 96 and then is transmitted to the second signal output port a.
Wherein, a large signal refers to a signal with a strength greater than-20 dBm.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (1)
1. A receive amplification assembly, characterized by: the signal combiner comprises a first horizontally polarized signal input port (1), a first vertically polarized signal input port (2), a second horizontally polarized signal input port (3), a second vertically polarized signal input port (4), a first combiner (5) electrically connected with the first horizontally polarized signal input port (1) and the second horizontally polarized signal input port (3), a first receiving amplification link (6) and a first signal output port (7) electrically connected with the first combiner (5) in sequence, a second combiner (8) electrically connected with the first vertically polarized signal input port (2) and the second vertically polarized signal input port (4), a second receiving amplification link (9) and a second signal output port (a) electrically connected with the second combiner (8) in sequence;
the first horizontally polarized signal input port (1), the second horizontally polarized signal input port (3) and the first combiner (5) are electrically connected, and the first vertically polarized signal input port (2) and the second vertically polarized signal input port (4) and the second combiner (8) are electrically connected, so that the circuits are in vertical transition;
the first signal output port (7) is used for outputting a horizontally polarized signal, and the second signal output port (a) is used for outputting a vertically polarized signal;
the first receiving amplification link (6) comprises a first filter (61) electrically connected with the first combiner (5), a first radio frequency switch (62), a first attenuator (63) and a second radio frequency switch (64) which are electrically connected with the first filter (61) in sequence, a first amplitude limiter (65) electrically connected with the first radio frequency switch (62), and a first low noise amplifier (66) one end of which is electrically connected with the first amplitude limiter (65), the other end of the first low noise amplifier (66) is electrically connected with the second radio frequency switch (64), and the second radio frequency switch (64) is electrically connected with the first signal output port (7);
the second receiving and amplifying link (9) comprises a second filter (91) electrically connected with the second combiner (8), a third radio frequency switch (92), a second amplitude limiter (93), a second low noise amplifier (94), a fourth radio frequency switch (95) and a second attenuator (96), wherein the third radio frequency switch (92), the second amplitude limiter (93), the second low noise amplifier and the fourth radio frequency switch (95) are sequentially electrically connected with the second filter (91), one end of the second attenuator (96) is electrically connected with the third radio frequency switch (92), the other end of the second attenuator (96) is electrically connected with the fourth radio frequency switch (95), and the fourth radio frequency switch (95) is electrically connected with the second signal output port (8);
the first radio frequency switch (62), the second radio frequency switch (64), the third radio frequency switch (92) and the fourth radio frequency switch (95) all employ gallium nitride-based power radio frequency switches;
the first horizontally polarized signal input port (1), the first vertically polarized signal input port (2), the second horizontally polarized signal input port (3), the second vertically polarized signal input port (4), the first signal output port (7) and the second signal output port (a) all adopt direct-plug interfaces;
the use method of the receiving amplification assembly comprises the following steps:
s1, when the first horizontally polarized signal input port (1) and/or the second horizontally polarized signal input port (3) has the horizontally polarized signal input, proceeding to step S2, when the first vertically polarized signal input port (2) and/or the second vertically polarized signal input port (4) has the vertically polarized signal input, proceeding to step S3;
s2, the horizontal polarization signal enters the first combiner (5), is synthesized by the first combiner (5) circuit, enters the first receiving and amplifying link (6), is filtered, attenuated or amplitude-limiting amplified and then is transmitted to a first signal output port (7) for output;
after the horizontally polarized signal enters the first receiving amplification link (6), filtering is carried out through the first filter (61) to obtain a first filtering signal, when the first filtering signal is a large signal, the first radio frequency switch (63) and the second radio frequency switch (64) are simultaneously communicated with the first attenuator (63), and the first filtering signal passes through the first attenuator (63) and then is transmitted to a first signal output port (7); when the first filtered signal is a small signal, the first radio frequency switch (63) is communicated with the first amplitude limiter (65), the second radio frequency switch (64) is communicated with the first low noise amplifier (66), and the first filtered signal is subjected to amplitude limiting amplification by the first amplitude limiter (65) and the first low noise amplifier (66) and then is transmitted to a first signal output port (7) for output;
the large signal is a signal with the intensity larger than-20 dBm;
s3, the vertical polarization signal enters the second combiner (8), is synthesized by the second combiner (8) circuit, enters the second receiving and amplifying link (9), is filtered, attenuated or amplitude-limiting amplified and then is transmitted to a second signal output port (a) for output;
after the vertical polarization signal enters the second receiving amplification link (9), filtering is carried out through the second filter (91) to obtain a second filtering signal; when the second filtered signal is a small signal, the third radio frequency switch (92) is communicated with the second amplitude limiter (93), the fourth radio frequency switch (95) is communicated with the second low noise amplifier (94), and the second filtered signal is subjected to amplitude limiting amplification by the second amplitude limiter (93) and the second low noise amplifier (94) and then is transmitted to a second signal output port (a); when the first filtering signal is a large signal, the third radio frequency switch (92) and the fourth radio frequency switch (95) are simultaneously communicated with the second attenuator (96), and the second filtering signal passes through the second attenuator (96) and then is transmitted to a second signal output port (a) for output.
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| CN202011228880.XA CN112564723B (en) | 2020-11-06 | 2020-11-06 | Receiving amplifying assembly |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6556807B1 (en) * | 1998-10-06 | 2003-04-29 | Mitsubishi Electric & Electronics Usa, Inc. | Antenna receiving system |
| TW492254B (en) * | 1999-03-02 | 2002-06-21 | Sony Corp | Low noise converter |
| CN104135299B (en) * | 2014-07-18 | 2016-10-19 | 中国电子科技集团公司第四十一研究所 | A kind of dual pathways two-stage frequency conversion broadband receiver and auto gain control method thereof |
| CN206181008U (en) * | 2016-10-17 | 2017-05-17 | 天津光电通信技术有限公司 | Receiver is reported an emergency and asked for help or increased vigilance in navigation of signal intensity adjustable low noise binary channels |
| CN208589909U (en) * | 2018-08-27 | 2019-03-08 | 华讯方舟科技有限公司 | A kind of dual output list local oscillator microwave frequency changer circuit and frequency converter |
| CN208873867U (en) * | 2018-11-20 | 2019-05-17 | 中国电子科技集团公司第五十四研究所 | A kind of portable double polarization array antenna |
| CN110850375B (en) * | 2019-11-18 | 2024-07-19 | 广东纳睿雷达科技股份有限公司 | Radar transceiver module |
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