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Antenna laying-out method used for increasing isolation degree of same-platform antennas

A technology of antenna isolation and layout method, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of reducing the possibility of coupling other antennas, small current energy, etc., and achieves low efficiency and improved isolation Effect

Inactive Publication Date: 2018-07-24
BEIHANG UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the first antenna is installed at the position with the smallest mode weight of all platforms, the current energy excited on the platform is the smallest, which indirectly reduces the possibility of coupling other antennas

Method used

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  • Antenna laying-out method used for increasing isolation degree of same-platform antennas
  • Antenna laying-out method used for increasing isolation degree of same-platform antennas
  • Antenna laying-out method used for increasing isolation degree of same-platform antennas

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Embodiment

[0047] Now take a small aircraft platform as an example, such as figure 2 As shown, the antennas to be laid out are two communication antennas working at 900MHz, so the calculation frequency is 900MHz. Antenna structure such as image 3 shown. First determine the best position for the first antenna, and then determine the best position for the second antenna, the goal is to obtain the best isolation.

[0048] Specific steps are as follows:

[0049] Step 1: Import the CAD model of the aircraft platform into FEKO software, perform grid division at the center frequency of 900MHz, the average length of the longest side of the triangular grid is 16mm, and export the grid and generate a .stl file. Run the runFEKO module to get the impedance matrix [Z] of the aircraft model and export it to a .mat file. Read the .mat file in MATLAB, and decompose the impedance matrix [Z] into a real part matrix [R] and an imaginary part matrix [X] for the characteristic equation The calculatio...

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Abstract

The invention discloses an antenna laying-out method used for increasing an isolation degree of same-platform antennas, and belongs to the field of system-level electromagnetic-compatibility design. According to the method, it is assumed that N to-be-laid-out antennas exist on a certain platform, MATLAB is utilized for writing a character-module calculation program, an impedance matrix [Z] generated by a CAD model of the platform in FEKO is read, mode currents are obtained, then excitation coefficients of platform modes are calculated according to an antenna excitation field, and antenna laying-out is completed through excitation coefficient distribution. Compared with currently-popular modern optimization algorithms, the method does not need setting of an optimization target or an optimization function, and can increase the isolation degree and determine optimal antenna positions simply through the mode excitation coefficients of character modules of the platform. Problems that optimization laying-out of multiple airborne antennas is low in efficiency, not good in effects and liable to not converge are solved.

Description

technical field [0001] The invention relates to an antenna layout method for improving the isolation degree of antennas on the same platform, in particular to an efficient antenna layout method based on characteristic mode theory, which belongs to the field of system-level electromagnetic compatibility design. technical background [0002] With the current aircraft, ships and other large platforms with multiple communication and navigation capabilities, more and more antennas working at the same frequency are installed on the same platform. The limited layout space on the platform makes the electromagnetic compatibility caused by the coupling between antennas The problem is becoming more and more prominent. Antenna layout is a low-cost and effective means to improve the isolation between antennas, and it is essential in the initial stage of system-level EMC design. [0003] From the perspective of coupling channels, there are two coupling paths for co-platform antennas: ant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/18Y02E60/00
Inventor 吴琦杨照苏东林
Owner BEIHANG UNIV
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