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Millimeter wave double channel stabilized receiving frontend

A receiving front-end, dual-channel technology, applied in radio transmission systems, electrical components, transmission systems, etc., can solve problems such as system failure, phase difference changes, and antenna deviation from the target

Active Publication Date: 2012-05-30
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the ambient temperature changes, the phase difference between the sum and difference channels changes sharply, and the antenna deviates from the target, so that the system cannot work normally. A feasible phase stabilization measure is urgently needed to improve the stability of the system

Method used

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  • Millimeter wave double channel stabilized receiving frontend
  • Millimeter wave double channel stabilized receiving frontend
  • Millimeter wave double channel stabilized receiving frontend

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Depend on figure 1 As shown, first, according to the structural layout, determine the fixed position of the difference channel LNA2, the difference channel down-converter 10, and the fixed position of the first local oscillator 11; pass the sum channel LNA1 and the sum channel down-converter 9 through the sum channel input waveguide 3 (the actual length is L3) fixed to the feed source polarization adjustment rotating body (the feed source polarization adjustment rotating body is a rotatable mechanical device, and the rotation of the motor drives the feed source of the antenna to rotate ±45° to realize The ground receiving antenna has the same polarization as the satellite downlink signal). Then, according to the actual needs, use the CA308 type stable cable to process the differential channel input fixed cable 4 (fixed length is L4), process the differential channel LNA output cable 6 (fixed length is L6), and the differential channel local oscillator cable 8 (fixed len...

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Abstract

The invention relates to a millimeter wave two-channel stable phase receiving front end for relay satellite communication measurement control, which comprises a first local oscillator (11), the first local oscillator (11) is connected with a sum channel downconverter (9) and a difference channel downconverter (10) through a sum channel local oscillation cable (7) and a difference channel local oscillation cable (8) respectively, millimeter wave is connected with a sum channel LNA (1) and a difference channel LNA (2) through a sum channel input waveguide (3) and a difference channel input cable (4) respectively, the difference channel LNA (2) is connected with the difference channel downconverter (10) through a difference channel output cable (6), and the sum channel LNA (1) is connected with the sum channel downconverter (9) through an adjustment cable (5). The adoption of the technical proposal realizes that the consistency of two-channel phase achieves 1.5 DEG within the entire working temperature range and is far superior to a desired value of 8 DEG of the system, and ensures that the automatic tracking accuracy of the system is improved.

Description

technical field [0001] The invention relates to a dual-channel phase-stable receiving front-end, in particular to a millimeter-wave dual-channel phase-stable receiving front-end used in relay satellite communication measurement and control. Background technique [0002] The relay satellite ground terminal station antenna adopts a single-pulse dual-channel tracking method. The key to this tracking method is to maintain the relative consistency of the sum and difference channels. The relay satellite works in the millimeter frequency band, and its wavelength is only one tenth of the S-band wavelength. one. In the previous S-band unified measurement and control system, the phase change caused by the time delay change is not large and will not affect the system work, so it has not been paid attention to by people. In the millimeter frequency band, the wavelength is only a dozen millimeters, and according to the transmission line theory, a quarter-wavelength change will reverse t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/185H04B1/00
Inventor 陈建民史东湖张政伟赵云刘凯辉刘伟霞
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP