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Spherical surface multi-layer film polarization compensating device based on crossing bipole reflection surface antenna

A multi-layer film and reflective surface technology, applied in the field of communication, can solve the problems of increasing system cost and inability to receive signals at the receiving end

Inactive Publication Date: 2008-10-29
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] To sum up, the current beam width reflected by the reflective surface based on the crossed dipole as the feed source is narrowed due to the distortion of the polarization, so that the receiving end cannot receive signals in a wide range, and strict alignment is required , which increases the cost of the system

Method used

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  • Spherical surface multi-layer film polarization compensating device based on crossing bipole reflection surface antenna
  • Spherical surface multi-layer film polarization compensating device based on crossing bipole reflection surface antenna
  • Spherical surface multi-layer film polarization compensating device based on crossing bipole reflection surface antenna

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Embodiment Construction

[0027] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] figure 1 A spherical multilayer film structure for polarization compensation is described.

[0029] The 101st layer is an air layer, and the refractive index is set to n0. The electromagnetic wave is incident from the 101st layer, and is transmitted and reflected between 101 and 102. 102 is the first medium of the ABAB structure of the spherical multilayer film, with a refractive index of n1 and a thickness of d1. 103 is the second medium with a refractive index of n2 and a thickness of d2. 104 and 105 are the same as 102 and 103 respectively , forming a periodic repeating structure. 106 is the base, the refractive index is ns, and the thickness is ds.

[0030] For spherical multilayers, the field equations can be described using modified Maxwell's equations:

[0031] The incident signal will be reflected and transmitted at each layer, and t...

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Abstract

The invention relates to the communication field, the embodiment of which discloses a polarization compensation device used for transmitting signals by an antenna in the mobile communication. The method of the embodiment of the invention comprises the steps; polarized deflection caused by the dispersion of a reflecting surface is compensated by the structure of a spherical multilayer film; the coefficients of an incident field and a transmitted field are calculated by a transition matrix method; an extendible strut bar is utilized to adjust the longitudinal position of the spherical multilayer film. According to the method of the invention, the polarized deflection caused by the dispersion of the reflecting surface is compensated by the simply added spherical multilayer film, meanwhile, the width of the wave beams of the transmitting antenna is increased and the alignment requirements of a receiving end are reduced, so as to reduce the realization complexity of receiving equipment. The method of the invention slightly promotes the far gain of the antenna.

Description

technical field [0001] The invention relates to the communication field, in particular to a device for polarization compensation of signals transmitted by an antenna in mobile communication. Background technique [0002] With the rapid development of wireless mobile communications, Circular Polarized Antennas (CPAs for short) are widely used, and the performance of Circular Polarization (CPs for short) in the beam direction determines the width of available beams. For ultra-long-distance transmission, positioning such as GPS satellites can be maintained within a wide range, realizing multi-angle positioning functions, and reducing additional system costs due to target deviation. In many antenna designs, the crossed-dipole (Crossed-Dipole) reflector antenna as the feed source can obtain better CP performance in the beam direction. Different polarization-mode-value ratios caused by scattering due to reflective surfaces and spatial occlusions reduce the available beamwidth of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q19/10H01Q19/12H01Q15/14H01Q15/16
Inventor 李彬李桂仁周锡增张永军黄善国顾畹仪
Owner BEIJING UNIV OF POSTS & TELECOMM
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