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A Low VSWR High Sensitivity Millimeter Wave Detector

A technology with high sensitivity and standing wave ratio, applied in the field of testing, to achieve the effect of small overall size, reducing port standing wave and improving sensitivity

Active Publication Date: 2020-04-28
CHINA ELECTRONIS TECH INSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the main disadvantage is that the sensitivity will drop by one or two orders of magnitude, and the resistance RM needs to be changed to compromise the two indicators of frequency bandwidth and sensitivity.

Method used

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  • A Low VSWR High Sensitivity Millimeter Wave Detector
  • A Low VSWR High Sensitivity Millimeter Wave Detector

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Embodiment Construction

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] At present, the millimeter-wave detection circuit applied to the millimeter-wave radiometer mostly adopts the waveguide-microstrip transition structure cascaded matching circuit and then directly feeds into the detection diode. Since these matching circuits belong to the lossless reactance network, the The bandwidth of the detector with this structure is relatively narrow, so it is difficult to be used in microwave circuits with wide bandwidth requiremen...

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Abstract

The present invention proposes a low standing wave ratio high-sensitivity millimeter wave detector, comprising: a branch bridge, two detector tubes with the same characteristics, a detector tube matching circuit and a wedge-shaped absorbing load, the input signal is input from the signal input end, and passes through the branch bridge The power is equally divided, and then fed to the detector tubes through the matching circuit respectively. The characteristics of the two detector tubes are the same, and the signals reflected by the two detector tubes are opposite in phase at the signal input end, just canceling. The present invention reduces the difficulty of matching with the previous stage circuit by setting the echo cancellation and absorption circuit; the design of the 3dB electric bridge and the matching circuit reduces the standing wave at the port and improves the sensitivity of the detector; Small size, easy to mass production.

Description

technical field [0001] The invention relates to the technical field of testing, in particular to a millimeter wave detector with low standing wave ratio and high sensitivity. Background technique [0002] As a key component of the millimeter-wave radiometer, the low standing wave ratio and high-sensitivity millimeter-wave detector plays an important role in the millimeter-wave radiometer system and determines the sensitivity of the millimeter-wave radiometer. At the same time, as one of the conventional components in millimeter wave technology, the millimeter wave detector is a key component in the application of micro millimeter wave signal detection, automatic gain control, power detection, and amplitude stabilization control, and is widely used in vector network analyzers, Six-port network, microwave instantaneous receiver, microwave remote sensing probe and other equipment. [0003] At present, there are three main solutions to obtain low VSWR and high sensitivity: [...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R29/08
CPCG01R29/0871
Inventor 王明超邓建钦刘金现
Owner CHINA ELECTRONIS TECH INSTR CO LTD