A Microstrip Low Axial Ratio Circularly Polarized Antenna for Airborne Radiation Field Measurement

A circularly polarized antenna, low axial ratio technology, applied to antenna unit combinations with different polarization directions, antennas, antenna coupling and other directions, can solve the problems of low microwave radiation field measurement accuracy, easy antenna mismatch, etc. Axial ratio characteristics, small distortion, the effect of increasing standing wave bandwidth and axial ratio bandwidth
CN107809000BActive Publication Date: 2020-03-31中国人民解放军63660部队
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
中国人民解放军63660部队
Publication Date
2020-03-31

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Abstract

The invention discloses a micro-strip low-axial-ratio circularly-polarized antenna for aerial radiation field measurement. The micro-strip low-axial-ratio circularly-polarized antenna comprises a medium substrate. A plurality of circular slot units in central symmetry are formed in the front surface of the medium substrate through etching. The center of each circular slot unit is provided with a unit center rectangular groove. One side of each unit center rectangular groove is provided with one feed probe welding hole, and the feed probe welding hole adopts coaxial probe backward feed. The plurality of circular slot units are arrayed in a sequential rotation mode. The back surface of the medium substrate is provided with a copper-clad floor. The copper-clad floor is provided with grooves in the places corresponding to the circular slot units respectively; and the feed probe welding holes are arranged in the grooves respectively. The micro-strip low-axial-ratio circularly-polarized antenna improves circular polarization purity, realizes low-axial-ratio characteristics and is suitable for accurate measurement of an aerial microwave radiation field.
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Description

technical field

[0001] The invention relates to the technical field of microwave measurement, in particular to a circularly polarized antenna with a low axial ratio based on a microstrip array for measuring the radiation field in the air, which is suitable for microwave signal measurement when the incoming wave signal is linearly polarized and the polarization direction is uncertain . Background technique

[0002] Microwaves refer to electromagnetic waves with a frequency between 300MHz and 300GHz and corresponding electrical wavelengths between 1m and 1mm. Using the antenna to convert the received radiation signal into a guided wave on the transmission line is an important means to evaluate the frequency, power, time domain and other parameters of the incoming wave signal.

[0003] When measuring the microwave radiation field in the air, affected by the high-altitude wind, it is difficult for the air test platform to maintain the stability of the ground radiation field mea...

Claims

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