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Circular polarization implementation mode

A circular polarization, circular technology, applied in the field of communication, can solve the problems of large space occupation and increased cost

Pending Publication Date: 2020-10-23
KUNSHAN RUIXIANG XUNTONG COMM TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, most of the circular polarization realization technologies disclosed in the prior art are to achieve circular polarization by feeding multiple branches to meet the circular polarization realization conditions of spatial orthogonality and phase difference of 90 degrees. This kind of circular polarization realization The method has strict requirements on the feeding part, and sometimes a phase shifter and a bridge are introduced to achieve a specific feeding phase difference, which adds a certain cost to the actual use, and generally requires multiple radiation branches to realize circular polarization, occupying larger space

Method used

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Embodiment

[0034] Such as figure 1 As shown, the most basic circular antenna is used. In the simulated example, the radius of the metal ring is 229mm, and the thickness of the metal ring is 1mm; figure 1 Three points A, B, and C are marked in , and the relative positional relationship of the three points is that point A is vertically above the figure, point B is in the direction of a 45-degree angle in the figure, and the line connecting point C and point B passes through the center of the circle, above The three points A, B, and C are very important in the structure, and they are the three key positions for realizing circular polarization by using the characteristic mode.

[0035] figure 1 The eigenmode current distribution for a complete metallic torus structure is given in , figure 1 The current distribution characteristics of eigenmode 1 and eigenmode 2 are given in the lower middle. Because the metal ring is structurally symmetric, it can be seen that the current distribution of ...

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Abstract

The invention provides a circular polarization implementation mode. The circular polarization implementation mode comprises the steps of taking three points A, B and C on the circumference of a metalloop antenna; performing feeding on the point A, and connecting capacitors or inductors with specific reactance values in series at the point B and the point C, wherein the phase difference of the twocharacteristic modes is 90 degrees at frequency points with equal amplitudes, the antenna designed by adopting the method can achieve good circular polarization characteristics, and an axial ratio simulation result at a resonant frequency point shows that the axial ratio is less than 3dB.

Description

technical field [0001] The present application belongs to the technical field of communication, and in particular relates to a circular polarization implementation manner. Background technique [0002] The antenna is essentially a transducing device for guided waves and free space waves. Transduction refers to the process of converting the guided waves on the transmission line into electromagnetic waves that can be transmitted in free space and the opposite process. When an electromagnetic wave propagates in space, the instantaneous direction of its electric field vector is called polarization. According to the different polarization rules, electromagnetic waves can be divided into two types: linearly polarized waves and circularly polarized waves. [0003] Circularly polarized wave refers to the electromagnetic wave whose trajectory of the endpoint of the instantaneous electric field vector changes with time is circular. Antennas that can generate circularly polarized wave...

Claims

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Application Information

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IPC IPC(8): H01Q1/36H01Q1/50H01Q9/04H01Q15/24
CPCH01Q1/36H01Q1/50H01Q9/0428H01Q15/24
Inventor 袁涛王洪洋王松钱可伟
Owner KUNSHAN RUIXIANG XUNTONG COMM TECHCO
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