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Variable-polarization balanced radar RF front-end device

A radio frequency front-end and radar technology, which is applied in the field of polarization-changing balance radar radio frequency front-end devices, can solve problems such as leakage and anti-interference in continuous wave radar systems, and achieve simple structure, improved anti-interference ability, and small size Effect

Active Publication Date: 2017-02-15
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current variable polarization system does not consider the problem of leakage or still uses a dual-antenna structure, while the continuous wave radar system does not consider the problem of anti-jamming

Method used

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  • Variable-polarization balanced radar RF front-end device
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  • Variable-polarization balanced radar RF front-end device

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Embodiment Construction

[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0017] combine figure 1 , the radio frequency front-end device of the variable polarization balanced radar of the present invention is characterized in that it includes two single-pole double-throw switches, four orthogonal couplers and two double-fed antennas, and the four orthogonal couplers include A and B respectively. , C, and D four ports, wherein A and B ports are directly connected, and A and C ports are coupled; wherein the first single-pole double-throw switch 1 is connected with the A port and the D port of the first orthogonal coupler 2, and the first The B port of a quadrature coupler 2 is connected to the A port of the second quadrature coupler 3, and the C port of the first quadrature coupler 2 is connected to the A port of the third quadrature coupler 4; the second quadrature coupler The B port of the device 3 is connected wit...

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PUM

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Abstract

The invention relates to a variable-polarization balanced radar RF front-end device comprising two double-feed antennas, four quadrature couplers, two single-pole double-throw switches and microstrip lines. A transmitted signal is divided into two signals by a single-pole double-throw switch through a quadrature coupler, and then the two signals feed the two double-feed antennas via the quadrature couplers respectively. The isolating ends of the two quadrature couplers are connected to the symmetrical quadrature couplers respectively and are output selectively selected via the second single-pole double-throw switch. The device is simple in structure, low in cost and high in reliability, can easily realize the switching of two circular polarizations, improves an anti-interference ability, and solves, as a single-antenna system, problems of leakage cancellation, antenna reflection and partial coupling, and will be rapidly applied and developed in the field of short-range detection and small continuous wave radars.

Description

technical field [0001] The invention belongs to the technical field of radar communication and short-range detection, in particular to a radio frequency front-end device of variable polarization balance radar. Background technique [0002] With the scientific progress in various fields such as microelectronics and the continuous development of radar technology, its connotation and research content are constantly expanding. In particular, the detection application of short-range detection radar is getting deeper and deeper into the civilian field, and short-range detection radar has been applied and researched more and more. Typical short-range radars, as well as personal radars, ultra-short-range aircraft take-off test radars, short-range Doppler speed radars, etc., are all examples of short-range detection radars. The short-range radar is characterized by small size, generally miniaturization is better, and at the same time, the cost is low, and it is suitable for civilian...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/50G01S7/285
Inventor 张新鹏陈春红吴文汪敏缪晨廖明
Owner NANJING UNIV OF SCI & TECH
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