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Millimeter-wave-based microstrip-coaxial transformational structure

A technology of coaxial conversion and coaxial structure, which is applied in the field of radar, can solve the problems of relatively high processing precision requirements for microstrip-fin line conversion, inability to meet the stringent requirements for the volume of transceiver components, and unsuitable for the development of miniaturized components. Achieve the effect of improving port standing wave, ensuring consistency and operability, and easy assembly

Inactive Publication Date: 2017-02-22
CNGC INST NO 206 OF CHINA ARMS IND GRP
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  • Abstract
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  • Application Information

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Problems solved by technology

The main problem with the microstrip probe-waveguide structure is its large volume, which cannot meet the demanding volume requirements of transceiver components and is not suitable for the development of miniaturized components. Moreover, the waveguide is in the form of an open port and has no airtightness.
The main problem of microstrip-fin line conversion is that the processing accuracy is relatively high, and the transmission loss is relatively large

Method used

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  • Millimeter-wave-based microstrip-coaxial transformational structure
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  • Millimeter-wave-based microstrip-coaxial transformational structure

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Embodiment Construction

[0030] The present invention is based on the basic theory of microwaves. In the coaxial line transmission medium, what is transmitted is TEM wave, and the TEM wave is the main mode of the coaxial line. In a coaxial cable, the electromagnetic field is only E r and Two components, the electromagnetic field distribution of which is as figure 1 shown. Its characteristics are: the electric field strength is stronger when it is closer to the inner conductor, so the high-frequency current density on the surface of the inner conductor is much larger than the high-frequency current density on the surface of the outer conductor, and the high-frequency loss in the coaxial line will also be concentrated in the Inner conductors with smaller cross-sectional dimensions.

[0031] The working mode of the coaxial line is TEM mode. For TEM mode, the characteristic impedance can be obtained through "voltage" and "current".

[0032] The voltage between the inner and outer conductors of the co...

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Abstract

The invention relates to a millimeter-wave-based microstrip-coaxial transformational structure. Special dual-air-cavity-transitional design is adopted, so that high performance requirement on microwave signal transmission is satisfied; signal transmission is carried out by adopting a dual-air-cavity-transitional way; an annular matched bonding pad is adopted at the input end of the microstrip, so that high microstrip-coaxial matching is realized, and effective signal transmission is ensured; and two air cavities are introduced at the input end and the output end of a coaxial body for transition, so that the port standing wave is improved, and the transmission efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of radar, in particular to the problem of microstrip-coaxial conversion in millimeter wave transceiver components. Background technique [0002] With the development of microwave and millimeter wave solid-state devices, the operating frequency of components is getting higher and higher, and the volume is getting smaller and smaller. The traditional single-layer wiring form can no longer meet the miniaturization requirements of components, and multi-layer wiring is required to compress the volume. This requires signal interconnection between different signal layers. [0003] In the millimeter wave frequency band, traditional multilayer microstrip interconnection forms include microstrip probe-waveguide conversion, microstrip-fin line conversion, etc. The main problem of the microstrip probe-waveguide structure is its large volume, which cannot meet the stringent volume requirements of transceiver components ...

Claims

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Application Information

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IPC IPC(8): H01P5/08
CPCH01P5/085
Inventor 张国强武华锋华根瑞李锐杜勇李磊马云柱张思明
Owner CNGC INST NO 206 OF CHINA ARMS IND GRP
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