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A circularly polarized rectangular loop antenna with open stubs

A rectangular ring and circular polarization technology, applied in the field of circularly polarized rectangular ring antennas, can solve the problems of poor polarization performance, narrow antenna bandwidth, and high cost, and achieve the effects of low axial ratio value, good bandwidth performance, and reduced size

Active Publication Date: 2020-12-08
SYSU CMU SHUNDE INT JOINT RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The antenna structure using the single-feed method is simple and low in cost, but the antenna using the single-feed method has narrow bandwidth and poor polarization performance; the antenna using the multi-feed method has better reflection coefficient and circular polarization bandwidth, and the axial ratio is good, but the antenna network is complex , the size is large, and it is not easy to integrate on portable devices; the antenna using the multi-element method is similar to an antenna array, and has high radiation gain, but this antenna is not only complex in structure, but also has a large size and high cost, and is not easy to integrate on portable devices

Method used

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  • A circularly polarized rectangular loop antenna with open stubs
  • A circularly polarized rectangular loop antenna with open stubs
  • A circularly polarized rectangular loop antenna with open stubs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 As shown, 1-medium plate, 2-rectangular ring, 21-short side of the first rectangle, 22-long side of the second rectangle, 23-short side of the third rectangle, 24-long side of the fourth rectangle, 3-protruding branch, 4- Feeder.

[0030] A circularly polarized rectangular loop antenna with open stubs, comprising a dielectric plate and an upper rectangular loop with protruding stubs, the rectangular antenna is fed by two parallel transmission lines at an angle of 135 degrees to the rectangular loop, at the end of the rectangular frame, a For the protruding stub units parallel to the upper and lower edges, the protruding stub units of the rectangular loop antenna are rotationally symmetrical about the center of the rectangle. The protruding branch unit is a single serpentine line with a ratio of 50%. The serpentine line at both ends of the right angle and the adjacent long straight line form the perturbation unit of the rectangular loop antenna. By adj...

Embodiment 2

[0034] Such as Figure 4 As shown, the first variant of a circularly polarized rectangular loop antenna with open-circuit stubs includes a dielectric plate and an upper rectangular loop with protruding stubs. The rectangular loop antenna is fed by two parallel transmission lines, and the transmission line is connected to the rectangular loop At an angle of 135 degrees, at the end of the rectangular ring frame, there is a pair of protruding stub units parallel to the upper and lower edges. The protruding stub units of the rectangular antenna are rotationally symmetrical about the center of the rectangle. Compared with this antenna, the two protruding stub units connected The right angle is replaced by a 90-degree 1 / 4 ring connection, and the double transmission line and the right-angle connection are replaced by two 90-degree 1 / 4 ring connections. The prominent branch units are double-shaped serpentine lines of the same proportion. The serpentine line at both ends of the right...

Embodiment 3

[0037] Such as Figure 7 As shown, the second variant of a circularly polarized rectangular loop antenna with open-circuit stubs includes a dielectric plate and an upper rectangular loop with protruding stubs. The rectangular antenna is fed by two parallel transmission lines, and the transmission line forms a rectangular loop At an angle of 135 degrees, at the end of the rectangular frame, there is a pair of protruding stub units parallel to the upper and lower edges. The protruding stub units of the rectangular antenna are rotationally symmetrical about the center of the rectangle. Compared with this antenna, the right angle where the two protruding branch units meet is replaced by a 90-degree 1 / 4 ring connection, and the double transmission line and the right-angle connection are replaced by two 90-degree 1 / 4 circles The rings meet. The prominent branch unit is a double serpentine line with a ratio of 54.55%. The serpentine line at both ends of the right angle and the adja...

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Abstract

The invention discloses a circularly-polarized rectangular loop antenna provided with an open-circuit branch. The circularly-polarized rectangular loop antenna comprises a dielectric plate and a rectangular ring arranged on the dielectric plate, wherein a connecting end of a first rectangular short side and a second rectangular long side of the rectangular ring is connected with a protruding branch, a connecting end of a third rectangular short side and a fourth rectangular long side is connected with another protruding branch, the two protruding branches are parallel, the other end of the first rectangular short side is connected with a feeder line, the other end of the fourth rectangular long side is connected with another feeder line; an included angle between each of the two feeder lines and the correspondingly connected rectangular side is 135 degrees; the protruding branches are in a snakelike shape, the protruding branches have the same lengths and identical bending dimensions,a perturbation unit is formed by each protruding branch and the adjacent rectangular long side, a 90-degree phase difference is obtained through adjusting lengths of the sides of the rectangular ringand the bending dimensions of the protruding branches, so that the antenna can obtain circular polarization characteristics. The circularly-polarized rectangular loop antenna adopts the loop antenna and utilizes features of single feeding, eliminates the burden of a complex power dividing network, enables the size of the antenna to be smaller, has a simpler structure, and achieves the feature of circular polarization.

Description

technical field [0001] The present invention relates to the field of circularly polarized rectangular loop antennas with open-circuit stubs, and more particularly relates to a circularly-polarized rectangular loop antenna with open-circuit protruding branches. Background technique [0002] An antenna is a transformer that transforms a guided wave propagating on a transmission line into an electromagnetic wave propagating in an unbounded medium (usually free space), or vice versa. A component used in radio equipment to transmit or receive electromagnetic waves. Anyone who uses electromagnetic waves to transmit information relies on antennas to work, so antennas are widely used in various fields of life. [0003] The importance of communication in social life is gradually increasing, and the antenna as the eye of wireless communication directly affects the quality and efficiency of communication. With the continuous development of science and technology and society, the requ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/50H01Q1/38H01Q7/00
CPCH01Q1/38H01Q1/50H01Q7/00
Inventor 谭洪舟苗登喜曾淼旺安德烈.安德烈尼克陈智聪路崇曾衍瀚
Owner SYSU CMU SHUNDE INT JOINT RES INST