A multi-channel waveguide coupler for calibration network
A coupler and waveguide technology, which is applied in the field of multi-channel waveguide couplers, can solve the problems that the calibration channel does not contain antenna units, the overall structure is complex, and the stability is difficult to guarantee, so as to achieve the consistency of amplitude and phase, good stability, and integration Tall, compact effect
Active Publication Date: 2021-09-07
BEIJING RES INST OF TELEMETRY +2
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Problems solved by technology
[0005] The traditional monitoring and calibration network uses a coupler between the antenna unit and the TR component, and multi-level cascading between each channel. The overall structure is complex, and the calibration channel does not include the difference between the antenna units.
Or add a calibration line under or on the side of the antenna unit, its stability is difficult to guarantee
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[0031] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
[0032] The multi-channel waveguide coupler used for calibrating the network shown in the attached figure is an eight-channel waveguide coupler, which can be easily expanded to 16 channels, 32 channels, 64 channels, etc. according to the actual number of coupling channels required.
[0033] Such as figure 1 A multi-channel waveguide coupler for calibrating network is shown, the present invention includes: branch waveguide 1, coupling waveguide 2, coupling hole 3, impedance tuning diaphragm 4, waveguide matching load 5, wherein the impedance tuning diaphragm is divided into branches The waveguide diaphragm 41 is coupled with the waveguide diaphragm 42 .
[0034] The number of branch waveguides 1 is consistent with the number of branches of the actual coupler, figure 1 The number of branch waveguides 1 of the shown eight-channel waveguide coupler...
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The invention discloses a multi-channel waveguide coupler for calibrating a network, which comprises a branch waveguide, a coupling waveguide, a coupling hole, an impedance tuning diaphragm and a waveguide matching load. Coupling holes are formed on the common wall of the narrow side of the branch waveguide and the broad side of the coupling waveguide to couple the energy in the coupling waveguide to the branch waveguide. An impedance tuning diaphragm is added between the two coupling holes inside the coupling waveguide to offset the reflection caused by the coupling holes in the coupling waveguide. An impedance tuning film is also added in each branch waveguide to offset the reflection caused by the coupling hole in the branch waveguide. Therefore, it is ensured that the port standing wave ratio of the multi-channel waveguide coupler is very small and will not affect the main transmission signal. The invention has the advantages of easy control of coupling degree, high isolation degree between channels, compact structure, convenient array formation and production, good amplitude and phase consistency and stability, and can be used for the design of large-scale phased array waveguide calibration network.
Description
technical field [0001] The invention relates to a multi-channel waveguide coupler used for calibrating networks, which can be used for monitoring and calibrating networks of phased array antennas, and belongs to the technical field of passive networks. Background technique [0002] Phased array antennas have been widely used in missile-borne and airborne radar equipment due to their advantages such as high radiation efficiency, compact structure, easy realization of low sidelobes, and stable and reliable performance. [0003] In order to guarantee and maintain the active phased array antenna for fault judgment, positioning, performance evaluation, etc., and ensure its performance characteristics, reliability and maintainability throughout the life cycle, a monitoring and calibration network is generally designed inside the phased array antenna , its role is to realize the detection and calibration of the signal of each radio frequency channel. [0004] The monitoring and ca...
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IPC IPC(8): H01P5/18G01R29/10
CPCG01R29/10H01P5/18
Inventor 孟明霞于勇丁克乾史永康郭丽
Owner BEIJING RES INST OF TELEMETRY