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Phase interferometer based on broadband dual-polarized antenna array and direction finding method thereof

A technology of dual-polarized antennas and phase interferometers, which is applied to antenna arrays, antennas, orientators for measuring directions, etc., can solve the problem of low precision of direction finding, inability to determine antenna array parameters, and no formula to give analytical relationship of antenna array parameters and other issues to achieve the effect of comprehensive adaptability

Active Publication Date: 2017-05-10
HARBIN INST OF TECH AT WEIHAI
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages are: narrow working bandwidth and low direction finding accuracy
The existing interferometer design method does not have a formula to give the analytical relationship between the antenna array parameters and the direction-finding performance indicators. The design process is carried out in an iterative manner of "selection-verification", and it is impossible to directly determine the antenna array parameters according to the requirements of the indicators.

Method used

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  • Phase interferometer based on broadband dual-polarized antenna array and direction finding method thereof
  • Phase interferometer based on broadband dual-polarized antenna array and direction finding method thereof
  • Phase interferometer based on broadband dual-polarized antenna array and direction finding method thereof

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Embodiment

[0135] In the three-dimensional electromagnetic simulation model shown in FIG. 4 , ports 1 to 6 are defined as: 1_H to 1_V, 1_V to 2_H, 2_H to 2_V, 2_V to 3_H, and 3_H to 3_V. The side length of the antenna unit is about 54 mm, the overall height is about 86 mm, the distance between the units is about 173 mm, and the height of the microwave absorbing material is about 85 mm. The VSWR characteristics of the six antenna ports are shown in Figure 5, and the isolation of the two ports is shown in Figure 6. It can be seen from the figure that the average voltage standing wave ratio of the antenna is about 2 in the frequency range of 1.5GHz to 4GHz, and the isolation between each port is greater than 20dB. In the range of 3GHz to 4GHz, the port isolation is greater than 30dB, which can It satisfies the application requirements of practical ultra-wideband dual-polarization electronic systems.

[0136] In order to characterize the radiation characteristics of the antenna, the simulat...

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Abstract

The invention relates to a phase interferometer based on a broadband dual-polarized antenna array and a direction finding method thereof. The phase interferometer based on a broadband dual-polarized antenna array is characterized in that the phase interferometer comprises three double-polarized ultra-broadband loudspeaker-equipped antenna units, a metal mounting base and a broadband microwave absorbing material, wherein the double-polarized ultra-broadband loudspeaker-equipped antenna has a metal structure; two polarized ports are orthogonally placed; coaxial bottom feeding is utilized; a slit has a continuous gradual change structure; the bottom of each antenna unit has a waveguide chamber structure, thereby realizing an impedance matching function; a gradual change structure is adopted on four metal arms at periphery of the chamber, thereby further realizing impedance matching and reducing voltage standing-wave ratio; and chamfering is performed on four ridges of the antenna, thereby reducing the voltage standing-wave ratio of two ports. The phase interferometer and the direction finding method thereof are suitable for spaceborne, airborne, missile-borne and other related radio direction finding systems and have a more comprehensive parameter measuring function and higher platform adaptability.

Description

[0001] Technical field: [0002] The present invention relates to the technical field of broadband dual-polarization antenna array sensor device and its direction finding, in particular to a phase interferometer based on broadband dual-polarization antenna array and its direction-finding method which can be used in radio systems such as radar and communication . [0003] Background technique: [0004] In electronic systems such as radio navigation, electronic reconnaissance, electronic tracking and electronic countermeasures, a very important task is to determine the position of the target. There are many methods and types of direction finding, which can be roughly divided into two categories according to the direction diagram of the antenna. One is to use a certain directionality of a simple vibrator or antenna array to find direction; the other is to use system functions to find direction, and there is no special requirement for the antenna pattern. The former can find out ...

Claims

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Application Information

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IPC IPC(8): H01Q1/12H01Q13/02H01Q15/24H01Q17/00H01Q21/00G01S3/46
CPCG01S3/46H01Q1/12H01Q13/0275H01Q15/24H01Q17/00H01Q21/0006
Inventor 宋立众李赛何露茜周辉媛王永建
Owner HARBIN INST OF TECH AT WEIHAI
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