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Active and passive combined polarization sensitive array antenna device with compact structure

A polarization-sensitive array and antenna device technology, which can be applied to specific array feeding systems, individually powered antenna arrays, and independent antenna unit combinations, etc. problems, to achieve the effect of improving electromagnetic compatibility, reducing impedance matching characteristics, and improving polarization characteristics

Inactive Publication Date: 2018-06-08
HARBIN INST OF TECH AT WEIHAI
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  • Application Information

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Problems solved by technology

In this design scheme, the working frequency band of the passive antenna should not be too low, and should be above the X-band to ensure that the diameter of the passive antenna is relatively small, otherwise, the performance of the active antenna will be seriously affected due to the large diameter of the passive antenna

Method used

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  • Active and passive combined polarization sensitive array antenna device with compact structure
  • Active and passive combined polarization sensitive array antenna device with compact structure
  • Active and passive combined polarization sensitive array antenna device with compact structure

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Embodiment

[0063] The present invention designs a specific active-passive composite polarization-sensitive antenna array structure device, uses full-wave electromagnetic simulation software to carry out performance simulation and optimized design of the antenna array, and the simulation experiment results verify the polarization-sensitive array proposed by the present invention Feasibility and effectiveness of antenna installations.

[0064] In the electromagnetic simulation model of the coplanar waveguide-fed dual-polarization microstrip patch antenna designed by the present invention, the two polarization ports are symmetrical. The VSWR characteristics of the two polarized ports are as follows: Figure 4 As shown, the isolation between ports is as Figure 5 shown. It can be seen from the figure that the voltage standing wave ratio of the antenna in the working frequency range is less than 2, and the isolation between each port is greater than 20dB on average, which is required for th...

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Abstract

The invention relates to the technical field of a polarization-sensitive array antenna, in particular to an active and passive combined polarization sensitive array antenna device with a compact structure. An installation platform is arranged, the active and passive combined polarization sensitive array antenna device with the compact structure is characterized in that an active radar antenna anda passive radar antenna are arranged, wherein the active radar antenna employs a coplanar waveguide (CPW) feeding-based dual-polarization square microstrip patch antenna, the passive radar antenna employs a miniature log periodic antenna LPDA, the LPDA of a printed circuit structure is employed, the active radar antenna is arranged at a central part of round aperture, a broadband passive antenna array is arranged at an edge part of the round aperture, a random layout mode in a circumferential direction is employed, and a metal grid mesh-type electromagnetic isolation device is also employed. The active and passive combined polarization sensitive array antenna device is applicable to satellite-borne, onboard, missile-borne and other relevant wireless direction finding systems, and has morecomprehensive parameter measurement function and platform adaptability.

Description

Technical field: [0001] The invention relates to the technical field of polarization-sensitive array antenna sensors, in particular to a compact active-passive composite polarization-sensitive array antenna device. Background technique: [0002] Polarization sensitive array (PSA) is a special array that can achieve joint filtering in space domain and polarization domain to obtain complete polarization information. Compared with ordinary arrays, it has obvious advantages. Polarization-sensitive array is a frontier and hot field of signal processing. It has time, space and polarization multi-dimensionality, and can make use of the inherent properties of signals and propagation information to a greater extent to improve the comprehensive performance of electronic systems such as radar and reconnaissance. Therefore, It has attracted the attention of many scholars in related fields. However, for the current large-scale radar system, under the premise of the same aperture, it wil...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/50H01Q1/52H01Q15/24H01Q21/00H01Q21/20H01Q21/28H01Q21/30
CPCH01Q1/50H01Q1/38H01Q1/521H01Q1/526H01Q15/24H01Q21/0006H01Q21/20H01Q21/28H01Q21/30
Inventor 宋立众王谦何露茜周辉媛王静
Owner HARBIN INST OF TECH AT WEIHAI
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