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Q-waveband ridge transition ortho-mode transducer

An orthogonal mode coupler and band technology, which is applied in the field of broadband microwave receivers, can solve problems such as being unfavorable to reduce the noise temperature of an antenna-feeder system, unable to achieve mass production, and large insertion loss.

Active Publication Date: 2017-02-15
XINJIANG ASTRONOMICAL OBSERVATORY CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the fin linear OMT, four-ridge OMT, and double-ridge transition-coaxial output OMT are all coaxial output ports. It is relatively difficult to manufacture, process, assemble and debug in the frequency band above Ka, and it is impossible to achieve mass production.
The structure of the four-arm synthetic OMT is relatively complex, and the insertion loss is relatively large, which is not conducive to reducing the noise temperature of the antenna feeder system

Method used

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  • Q-waveband ridge transition ortho-mode transducer
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Embodiment

[0028] A Q-band ridge transition quadrature mode coupler according to the present invention, the quadrature mode coupler is a broadband double ridge transition-branch synthesis type quadrature mode coupler, the working frequency band is 30-50 GHz, and it is applied to radio telescope Q A band receiver system, the orthogonal mode coupler consists of a double ridge transition-branch joint, a Y-shaped joint, a first E-shaped elbow, a second E-shaped elbow, a first side wall branch port, and a second side wall branch port , double ridge, double ridge transition section, matching nail, inductance diaphragm, first 90-degree elbow, second 90-degree elbow and impedance transformation section, double ridge transition-branch port 5 on the first side wall of branch joint 1 One end of the first E-bend 3 is connected, the other end of the first E-bend 3 is connected with the first 90-degree elbow 7 of the Y-joint 2; the second side wall branch of the double ridge transition-branch joint 1 ...

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Abstract

The invention relates to a Q-waveband ridge transition ortho-mode transducer. The coupler is of a broadband double-ridge transition-branch synthetic structure, has a center frequency of 40GHz and relative bandwidth of 50% and is used for a radio telescope Q-waveband receiver system. The ortho-mode transducer is composed of a double-ridge transition-branch joint, a Y-shaped joint, a first E-shaped bend, a second E-shaped bend, a first sidewall branch port, a second sidewall branch port, double ridges, a double-ridge transition segment, a coupling screw, an inductive diaphragm, a first 90-degree bend, a second 90-degree bend and an impedance transformation segment, wherein the double-ridge transition-branch joint is mainly used for separating two orthogonally polarized signals, double-ridge transition in a straight channel employs three steps, and a sidewall branch channel introduces the coupling screw and the inductive diaphragm; the Y-shaped joint is used for combining two horizontally polarized signals output by the double-ridge transition-branch joint into one signal; and the E-shaped bends are used for connecting the double-ridge transition-branch joint with the Y-shaped joint. The actual measurement results of reflection loss and isolation of the coupler are basically consistent with simulation results, and thus the radio astronomical observation demand is satisfied.

Description

technical field [0001] The invention relates to a Q-band ridge transition orthogonal mode coupler, which is specially used for wideband microwave receivers in the field of radio astronomy. Background technique [0002] In recent years, with the continuous development of the field of radio astronomy, the demand for the operating bandwidth and operating frequency of the radio telescope receiver system has been increasing. -Mode Transducer) to expand the working bandwidth and optimize the processing and assembly procedures of high-frequency OMT. [0003] In radio astronomy, Q-band receivers can be used for observations such as molecular spectral line surveys and high redshift CO spectral lines. The Xinjiang Astronomical Observatory of the Chinese Academy of Sciences plans to carry out Q-band observations on the Nanshan 25-meter radio telescope, with an observation frequency of 30-50 GHz and a working bandwidth percentage of 50%. Because the Q-band observation frequency is high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P5/12
CPCH01P5/12
Inventor 陈卯蒸马军闫浩李健刘艳玲王凯曹亮
Owner XINJIANG ASTRONOMICAL OBSERVATORY CHINESE ACADEMY OF SCI
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