CN115051722B - Carrier-borne multi-beam system microwave array front-end receiving device - Google Patents
Carrier-borne multi-beam system microwave array front-end receiving device Download PDFInfo
- Publication number
- CN115051722B CN115051722B CN202210576655.8A CN202210576655A CN115051722B CN 115051722 B CN115051722 B CN 115051722B CN 202210576655 A CN202210576655 A CN 202210576655A CN 115051722 B CN115051722 B CN 115051722B
- Authority
- CN
- China
- Prior art keywords
- microwave
- receiving
- receiving device
- checking
- self
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/04—Details
- G01S3/043—Receivers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/04—Details
- G01S3/12—Means for determining sense of direction, e.g. by combining signals from directional antenna or goniometer search coil with those from non-directional antenna
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/36—Means for anti-jamming, e.g. ECCM, i.e. electronic counter-counter measures
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radar Systems Or Details Thereof (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The application provides a front-end receiving device of a ship-borne multi-beam system microwave array, wherein a microwave receiving front-end component completes the functions of limiting, filtering and amplifying radar signals received by an antenna and realizing self-checking correction through an internal mechanical switch, a radio-frequency cable bundling cavity connects a connecting cable for transmitting multi-channel radio-frequency signals and a microwave front-end self-checking cable in a bundling mode, a radio-frequency SMA connector transmits radar signals received by the microwave receiving front-end component into the receiving device and transmits self-checking signals from the receiving device into the microwave front-end receiving component, a J30J socket realizes the interaction of the receiving device, the microwave front-end receiving component and rear-end power supply and control signals, a power divider is arranged in the receiving device, a power divider for transmitting rear-end power to one-way self-checking signals of the front end of the array is arranged in the receiving device, and a motherboard of the receiving device is arranged in the receiving device to realize the interconnection of the internal control and power supply functions of the receiving device. The application has the characteristics of high integration level, convenient installation, neatness, beautiful appearance, high reliability and the like.
Description
Technical Field
The application relates to a radio frequency front-end technology, in particular to a carrier-based multi-beam system microwave array front-end receiving device.
Background
At present, a passive direction finding technology is a key technology of electronic countermeasure, and for anti-reconnaissance and anti-interference, a modern radar has the characteristics of time variability, rapidity, large range and the like of a signal modulation mode and a modulation parameter. The method brings great difficulty to reconnaissance and identification of electronic countermeasure, and along with increasing complexity of electromagnetic environment and diversification of actual combat environment, the adaptability of the direction finding method and the requirements of direction finding precision under different combat conditions are also higher and higher. Multibeam amplitude-specific direction finding and interferometer direction finding are the two most widely used direction finding techniques at present. Whether the multi-beam amplitude-comparison direction-finding system or the interferometer direction-finding system, the number of the channels at the receiving front end is more, the connection relation between radio frequency signal interconnection and power supply control is complex, the connection workload is large, and the reliability is low. Meanwhile, the mechanical switch has the characteristics of high isolation, low loss, high power resistance and the like, is widely applied to the receiving front end, but has low long-term reliability of mechanical properties such as an internal electromagnetic relay, an elastic sheet and the like, and a fault detection function is required to be set to detect whether the switching is normal or not, so that the reliability of equipment is improved.
Disclosure of Invention
The application aims to provide a front-end receiving device of a carrier-based multi-beam system microwave array, which reduces the complexity of radio frequency signal interconnection and power supply control wiring of a multi-channel receiving front end and improves the use reliability of a mechanical switch.
The technical solution for realizing the purpose of the application is as follows: the utility model provides a carrier-borne multi-beam system microwave array front end receiving device, including microwave receiving front end subassembly, and install the radio frequency cable bundling chamber on array front end receiving device, the radio frequency SMA connects, J30J socket, power divider and receiving device mother board, wherein microwave receiving front end subassembly accomplishes the amplitude limiting of receiving the radar signal to the antenna, filtering, the amplification and realize self-checking correction function through inside mechanical switch, radio frequency cable bundling chamber is with connecting cable and the microwave front end self-checking cable of transmission multichannel radio frequency signal in the form of bundling, the radio frequency SMA connects the radar signal transmission that the microwave receiving front end subassembly received to receiving device inside, and with self-checking signal from receiving device inside transmission to microwave front end receiving module, J30J socket realizes the interaction of receiving device and microwave front end receiving module and rear end power supply and control signal, the power divider is installed in receiving device inside, the one-way self-checking signal power division multichannel of rear end transmission to this array front end is installed in receiving device inside, realize receiving device internal control and power supply function's interconnection.
Furthermore, the input end of the microwave receiving front end component is an SMP male head, the output end of the front end receiving antenna is an SMP male head, and the receiving antenna is connected with the microwave receiving front end through an SMP-KK joint in the middle.
Further, the first stage of the microwave receiving front end component is a single-pole double-throw mechanical switch, a mechanical switch fault detection device is designed in the microwave receiving front end component, whether the mechanical switch is switched normally is judged by detecting the contact resistance of the mechanical switch, when the contacts in the mechanical switch fail to be contacted normally, the detection circuit detects that the contact resistance is higher than a threshold value, the device feeds back the fault level to be transmitted to a rear end receiver through a J30J socket, and the receiver responds and then sends a reset signal to transmit and reset the channel mechanical switch through a corresponding link until the switching is normal.
Furthermore, the radio frequency cable bundling cavity inputs and outputs the connecting cables of all the channel working and self-checking branches through bundling connectors, and an outer packing mode is adopted inside the receiving device.
Further, the radio-frequency SMA connector comprises a radio-frequency SMA adapter LNA-Z and an LNA-W, and the self-checking channel and the working channel signals of the microwave front-end receiving component are respectively transmitted and transferred into the receiving device through a semi-rigid cable.
Furthermore, a boss installation power divider is arranged on the inner side wall of the receiving device, the power divider outputs rear-end self-checking signals to the self-checking end of the microwave front-end receiving assembly in a power division multiplexing mode, and the amplitude and phase consistency of each self-checking power division network channel are adjusted through a coaxial phase shifter in the receiving device.
Compared with the prior art, the application has the remarkable advantages that: (1) The microwave receiving front end is directly connected to the rear end of the antenna, so that the connection loss before the wave amplifying link is reduced, and the first stage adopts the functions of high isolation, high power resistance, low loss mechanical switch failure self-checking correction and the like, so that the noise coefficient is further reduced. Meanwhile, a mechanical switch fault detection circuit is added, so that the reliability of the microwave receiving front end is improved; (2) The radio frequency connecting wire and the power supply control connecting wire are connected into the receiving device through the SMA, the J30J and other switching joints, and the input and output of the bunched cable assembly and the multi-core J30J joint are adopted, so that the complexity of equipment is reduced, the layout of the microwave front end is compact, the microwave front end is tidier and attractive, the installation is convenient, and the maintainability is good; (3) The PCB is used in the receiving device to realize power supply and level control and is transmitted in the receiving device, so that the reliability is high and the anti-interference capability is strong; (4) The appearance and the installation method of the device can be changed according to the specific installation environment, and the device can be designed into planar type, circular arc type and coplanar installation of the receiving front end.
Drawings
Fig. 1 is a schematic diagram of the appearance of a front-end receiving device of a carrier-based multi-beam microwave array according to the present application.
Fig. 2 is a schematic diagram of the internal structure of the front-end receiving device of the carrier-based multi-beam microwave array according to the present application.
Fig. 3 is a schematic diagram of a mechanical switch detection circuit in a front-end receiving assembly of the front-end receiving device of the carrier-based multi-beam microwave array.
Fig. 4 is a schematic diagram of an internal motherboard of the front-end receiving device of the carrier-based multi-beam microwave array of the present application.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
As shown in fig. 1 and 2, the front end receiving device of the carrier-based multi-beam microwave array is characterized by comprising microwave receiving front end components LNA (LNA 1-28), radio frequency cable bundling cavities XSH (XSH 1-4), radio frequency SMA connectors LNA-Z and LNA-W (LNA 1-28-Z and LNA 1-28-W), J30J input and output sockets XS (XS 1-4 and LNA 1-28-C), power splitters and a mother board of the receiving device, wherein the radio frequency cable bundling cavities XSH (XSH 1-4) are arranged on the front end receiving device of the array. The microwave receiving front-end component LNA comprises interfaces such as input, output, self-checking input, power supply control, mechanical switch detection feedback output and the like, and the input end of the microwave receiving front-end component LNA is connected with a front-end receiving antenna; the output end is switched through a radio frequency SMA connector LNA-W, is transmitted to a bunched cable cavity XSH through an internal cable of the receiving device, and is output to rear-end receiving equipment; the self-checking input end is connected to the self-checking power division network in the receiving device through the radio frequency SMA connector LNA-Z switching, and receives the self-checking signal of the rear end; the power supply control and mechanical switch detection feedback output level is connected to the receiving device motherboard through the switching of the J30J connector LNA-C, is transmitted to the J30J input and output socket XS, receives power supply and control signals, and feeds back the detection level.
The LNA input end of the microwave receiving front-end component is an SMP male head, the output end of the front-end receiving antenna is an SMP male head, and the middle part is connected with the microwave receiving front end through an SMP-KK joint and a certain tolerance design. The cable is avoided from being connected with the receiving antenna and the microwave receiving front end, and the connection loss before the microwave amplifying link is reduced as much as possible, so that the noise coefficient of the receiving channel is reduced.
Furthermore, the internal flow of the receiving front-end component is a single-pole double-throw mechanical switch, a filter, a limiter and a low noise amplifier, the first-stage single-pole double-throw switch realizes self-checking and correcting functions, and the switch needs to have the characteristics of high isolation, high power resistance, low loss and the like. Based on the long-term stability of the mechanical performance of the mechanical switch, a mechanical switch fault detection circuit is designed in the microwave receiving front-end component, as shown in fig. 3, by detecting the contact resistance of the working input end (radio frequency channel 1) and the output end (radio frequency combining channel) of the mechanical switch and the self-checking input end (radio frequency channel 1) and the output end (radio frequency combining channel), namely, the comparison result of the level value of the detection point A, B and the level value of the C point, whether the mechanical switch is switched normally is judged. When the internal contact of the mechanical switch fails to normally contact, the detection circuit detects that the contact resistance is higher than a threshold value, the feedback fault level of the device is transmitted to the rear end receiver through the J30J output socket, and the receiver responds and then sends a reset signal to reset the channel mechanical switch through corresponding link transmission until the switching is normal.
The radio frequency cable bundling cavity XSH inputs and outputs connecting cables of all channel work and self-checking branches through bundling connectors, reduces cable wiring space, enables wiring space to be neat and attractive, reduces debugging workload of amplitude and phase of a self-checking network and a working network in an outsourcing mode inside a receiving device.
The radio frequency SMA adapter LNA-Z and LNA-W transmit and transfer the self-checking channel and working channel signals of the microwave front end receiving component LNA into the receiving device through the semi-rigid cable, so that the front end of the array surface is more attractive and tidy, and the maintenance and the replacement are more convenient.
The J30J input and output socket XS transfers power supply and control signal transmission of the microwave front end receiving assembly LNA into the receiving device, so that the front end of the array is more attractive and tidy, and detection and maintenance are more convenient.
The power divider is arranged on the side wall of the inner part of the receiving device, and a boss is arranged on the power divider, as shown in fig. 2, and the power divider in the receiving device is schematically arranged. The rear-end self-checking signal power division is multiplexed and output to the self-checking end of the microwave front-end receiving assembly, and the amplitude and phase consistency of each self-checking power division network channel are adjusted through the coaxial phase shifter in the receiving device.
The motherboard of the receiving device, as shown in fig. 4, realizes the transmission of power supply and level control in the receiving device, has higher reliability relative to the transmission of wires, has stronger anti-interference capability, and is tidier and more attractive.
In conclusion, the carrier-based multi-beam system microwave array front end receiving device has the advantages of high integration level, convenience in installation, neatness, attractiveness, high reliability and the like.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be assessed as that of the appended claims.
Claims (5)
1. The front end mounting and receiving device of the microwave array of the carrier-based interferometer is characterized by comprising a microwave receiving front end component, a radio frequency cable bundling cavity, a radio frequency SMA connector, a J30J socket, a power divider and a junction box motherboard, wherein the radio frequency cable bundling cavity is arranged on a junction box at the front end of the array, the microwave receiving front end component completes the functions of limiting, filtering, amplifying and self-checking correction of radar signals received by an antenna, the radio frequency cable bundling cavity connects a connecting cable for transmitting multiple paths of radio frequency signals and a self-checking cable at the front end of the microwave in a bundling mode, the radio frequency SMA connector transmits radar signals received by the microwave receiving front end component into the junction box, the self-checking signals are transmitted from the junction box into the microwave front end receiving component and the rear end of the junction box, the power divider is arranged in the junction box, the rear end of the junction box is transmitted to the front end of the antenna, and the junction box motherboard is arranged in the junction box to realize the internal control and functional interconnection of the junction box;
the first stage of the microwave receiving front end component is a single-pole double-throw mechanical switch, a mechanical switch fault detection device is designed in the microwave receiving front end component, whether the mechanical switch is switched normally is judged by detecting the contact resistance of the mechanical switch, when the contacts in the mechanical switch are not contacted normally, the detection circuit detects that the contact resistance is higher than a threshold value, the device feeds back the fault level to be transmitted to a rear end receiver through a J30J socket, and the receiver responds and then sends a reset signal to reset the mechanical switch through corresponding link transmission until the switching is normal.
2. The receiving device for front end installation of a microwave array of a carrier-based interferometer system according to claim 1, wherein the input end of the microwave receiving front end component is an SMP male head, the output end of the front end receiving antenna is an SMP male head, and the receiving antenna is connected with the microwave receiving front end through an SMP-KK joint in the middle.
3. The receiving device for front end installation of microwave array of carrier-based interferometer according to claim 1, wherein the radio frequency cable bundling cavity inputs and outputs the connecting cables of all channels and self-checking branches through bundling connectors, and the inside of the junction box adopts an outsourcing mode.
4. The receiving device for front end installation of a microwave array of a carrier-based interferometer system according to claim 1, wherein the radio-frequency SMA connector comprises a radio-frequency SMA adapter LNA-Z and a radio-frequency SMA adapter LNA-W, and the self-checking channel and the working channel signals of the microwave front end receiving assembly are respectively transferred into the junction box through semi-rigid cable transmission.
5. The receiving device for front end installation of microwave array of carrier-based interferometer according to claim 1, wherein a boss installation power divider is arranged on the inner side wall of the junction box, the power divider outputs rear-end self-checking signals to the self-checking end of the microwave front-end receiving assembly in a power division multiplexing way, and the amplitude and phase consistency of each self-checking power division network channel are adjusted in the junction box through a coaxial phase shifter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210576655.8A CN115051722B (en) | 2022-05-25 | 2022-05-25 | Carrier-borne multi-beam system microwave array front-end receiving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210576655.8A CN115051722B (en) | 2022-05-25 | 2022-05-25 | Carrier-borne multi-beam system microwave array front-end receiving device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115051722A CN115051722A (en) | 2022-09-13 |
| CN115051722B true CN115051722B (en) | 2023-08-18 |
Family
ID=83160047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210576655.8A Active CN115051722B (en) | 2022-05-25 | 2022-05-25 | Carrier-borne multi-beam system microwave array front-end receiving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115051722B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6297774B1 (en) * | 1997-03-12 | 2001-10-02 | Hsin- Hsien Chung | Low cost high performance portable phased array antenna system for satellite communication |
| CN110568429A (en) * | 2019-07-29 | 2019-12-13 | 北京遥测技术研究所 | Multi-beam multi-channel integrated receiving assembly |
| CN110988809A (en) * | 2019-12-18 | 2020-04-10 | 中国电子科技集团公司第二十研究所 | Phased array front end based on nonlinear active antenna |
| CN112994760A (en) * | 2021-04-26 | 2021-06-18 | 成都雷电微晶科技有限公司 | Multi-beam tile type TR (transmitter-receiver) component with high integration degree |
| CN113126074A (en) * | 2021-04-28 | 2021-07-16 | 西安天安电子科技有限公司 | X-band high-integration-level two-dimensional phased array radar radio frequency front end |
| WO2021252928A2 (en) * | 2020-06-11 | 2021-12-16 | Skygig, Llc | System and method for a multi-beam beamforming front-end architecture for wireless transceivers |
| CN114325603A (en) * | 2021-12-17 | 2022-04-12 | 中国航天科工集团八五一一研究所 | Broadband multi-beam phased array front end |
| CN216560975U (en) * | 2021-12-07 | 2022-05-17 | 北京理工大学 | Radio frequency vertical interconnection-based cableless 16-channel receiving tile |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10620297B2 (en) * | 2016-12-22 | 2020-04-14 | Apple Inc. | Radar methods and apparatus using in phased array communication systems |
| CN113540759B (en) * | 2021-06-21 | 2022-06-07 | 中兴通讯股份有限公司 | Antenna module, radio frequency device and base station |
-
2022
- 2022-05-25 CN CN202210576655.8A patent/CN115051722B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6297774B1 (en) * | 1997-03-12 | 2001-10-02 | Hsin- Hsien Chung | Low cost high performance portable phased array antenna system for satellite communication |
| CN110568429A (en) * | 2019-07-29 | 2019-12-13 | 北京遥测技术研究所 | Multi-beam multi-channel integrated receiving assembly |
| CN110988809A (en) * | 2019-12-18 | 2020-04-10 | 中国电子科技集团公司第二十研究所 | Phased array front end based on nonlinear active antenna |
| WO2021252928A2 (en) * | 2020-06-11 | 2021-12-16 | Skygig, Llc | System and method for a multi-beam beamforming front-end architecture for wireless transceivers |
| CN112994760A (en) * | 2021-04-26 | 2021-06-18 | 成都雷电微晶科技有限公司 | Multi-beam tile type TR (transmitter-receiver) component with high integration degree |
| CN113126074A (en) * | 2021-04-28 | 2021-07-16 | 西安天安电子科技有限公司 | X-band high-integration-level two-dimensional phased array radar radio frequency front end |
| CN216560975U (en) * | 2021-12-07 | 2022-05-17 | 北京理工大学 | Radio frequency vertical interconnection-based cableless 16-channel receiving tile |
| CN114325603A (en) * | 2021-12-17 | 2022-04-12 | 中国航天科工集团八五一一研究所 | Broadband multi-beam phased array front end |
Non-Patent Citations (1)
| Title |
|---|
| 5G小型化可重构收发信机的研制;田玲;《硕士论文》;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115051722A (en) | 2022-09-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101855139B1 (en) | Calibration in MIMO antenna | |
| CN104215936B (en) | A kind of eight unit T/R basic modules of S frequency range multi-beam transmission duplex | |
| US7884779B2 (en) | Multiple-input switch design | |
| EP2985842B1 (en) | Connector arrangement | |
| CN109039420B (en) | High-integration four-channel S-band transceiving component and phased array antenna | |
| CN115051722B (en) | Carrier-borne multi-beam system microwave array front-end receiving device | |
| CN210899166U (en) | Radio frequency control circuit and electronic equipment | |
| CN109450565B (en) | Calibration monitoring device and antenna system | |
| CN107104691B (en) | Multichannel receiving system for realizing input detection by adopting series-feed coupling | |
| CN212572567U (en) | Multipurpose broadband intelligent radio frequency photoelectric integrated transmitting and receiving assembly | |
| CN114709629A (en) | High-integration-level circularly polarized reconfigurable trunk detection and sounding integrated phased array antenna | |
| CN110221300B (en) | Cross backup switch network of planar integrated Ka waveband for remote sensing SAR radar | |
| US10996263B2 (en) | Frontend module and frontend for a radio frequency test device, and method for operating a frontend module | |
| US20200177228A1 (en) | Waveguide unit, waveguide device, and connection method | |
| CN117374593B (en) | Same-frequency high-isolation receiving-transmitting reciprocal feed network | |
| CN217903437U (en) | Multi-path GNSS positioning antenna assembly, automobile and positioning system | |
| US12040527B2 (en) | Redundant network system | |
| US20220359969A1 (en) | Redundant network system | |
| CN221148986U (en) | Active cable | |
| EP1006625B1 (en) | Straight/cross connection using double connector | |
| CN203826520U (en) | Frequency division multiplexing space diversity multiplexer | |
| RU157947U1 (en) | DISCONNECTING DEVICE | |
| JP2004500616A (en) | Insulated high-speed communication bus | |
| CN114665903A (en) | Millimeter wave front end processing circuit | |
| KR200239746Y1 (en) | a digital signal distributer module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |