Miniaturized Ka band single-channel modulator

Abstract

The invention discloses a miniaturized Ka band single-channel modulator comprising a first waveguide microstrip conversion module, a second waveguide microstrip conversion module, a Ka band 0 / pi modulator, a Ka band microstrip combiner and an aluminum shell, wherein the first waveguide microstrip conversion module, the second waveguide microstrip conversion module, the Ka band 0 / pi modulator, and the Ka band microstrip combiner are packaged in the aluminum shell. The first waveguide microstrip conversion module and the second waveguide microstrip conversion module separately convert a Ka band difference signal transmitted by an antenna and a rectangular waveguide TE10 mode of the signal into a quasi TEM mode of a microstrip line, the Ka band 0 / pi modulator realizes the phase modulation of the difference signal, and the Ka band microstrip combiner combines the Ka band with two paths of difference signals. The miniaturized Ka band single-channel modulator disclosed by the invention realizes a seamless connection with a waveguide feeder, improves the standing wave characteristic of ports, realizes miniaturization and light weight, and facilitates batch production.

Description

technical field [0001] The invention relates to a miniaturized Ka-band single-channel modulator, which is widely used in Ka-band single-channel single-pulse tracking systems. Background technique [0002] The single-channel modulator is an important part of the single-channel single-pulse tracking system. Its main function is to phase-modulate the difference signal from the antenna with a low-frequency signal, and then synthesize it with the sum signal to form a single-channel signal containing antenna pointing error information. AM signal. After the signal is down-converted, the tracking receiver only needs to perform envelope detection to obtain the error voltage related to the antenna pointing. [0003] The previous single-channel modulator used a coupler to synthesize the sum and difference signals, and added a useless isolation port. When used, the isolation port usually needs to be connected with an external 50Ω matching load, which increases the number of devices in ...

AI Technical Summary

Problems solved by technology

[0003] The previous single-channel modulator used a coupler to synthesize the sum and difference signals, and added a useless isolation port. When used, the isolation port usually needs to be connected with an external 50Ω matching load, which increases the number of devices in actual use, and also increases the size and Weight; the input and output ports of the previous single-channel modulator adopt the O-Ribbon coaxial microstrip transfer form, the port standing wave is poor, and it cannot be directly connected to the waveguide feeder, and an additional waveguide-coaxial converter is required; the previous single-channel The modulator needs to be bonded with gold strips for index debugging. The debugging workload is heavy, the index consistency is poor, and it is not suitable for mass production.

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