Low-profile, bandwidth, circularly polarized cross-dipole antenna

A cross-dipole and low-profile technology, which is applied in the field of antennas and circularly polarized cross-dipole antennas, can solve the problem of antenna bandwidth reduction and achieve the effects of increased bandwidth, increased gain, and increased bandwidth

Pending Publication Date: 2017-05-17
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at this time the antenna bandwidth is often greatly reduced

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  • Low-profile, bandwidth, circularly polarized cross-dipole antenna
  • Low-profile, bandwidth, circularly polarized cross-dipole antenna
  • Low-profile, bandwidth, circularly polarized cross-dipole antenna

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[0028] The technical details of the present invention will be described clearly and in detail below in conjunction with the drawings in the embodiments of the present invention, and the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by persons of ordinary skill in the art without making creative efforts all belong to the protection scope of the present invention.

[0029] An embodiment of the present invention is a low-profile, wide-band, high-gain, circularly polarized cross-dipole antenna. , including a first dielectric substrate 2, a second dielectric substrate 4, crossed dipoles 1 etched on the upper and lower surfaces of the first dielectric substrate 2, and a nylon support post 3 between the first dielectric substrate 2 and the second dielectric substrate 4 1. A reflection plate 5 etched on the lower surface of the second dielectric substrate 4...

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Abstract

The invention discloses a low-profile, bandwidth, circularly polarized cross-dipole antenna. The antenna comprises a cross-dipole radiator, two layers of dielectric substrates and an irregular reflector, wherein the cross-dipole radiator is composed of a ladder-like rectangular patch and a phase delay line respectively arranged on an upper surface and a lower surface of the upper dielectric substrate, and the phase delay line provides the phase difference at 90 DEG, thereby forming a circularly polarized radiation; the ladder-like rectangle patch can enable the antenna to produce the dual-band 3dB axial ration (AR) pass-band, and the introduction of the lower dielectric substrate can fuses two sections of AR pass-bands so as to greatly increase the AR bandwidth of the antenna; and the design of the irregular reflector enables the gain of the antenna to be well improved. The antenna disclosed by the invention creatively designs the ladder-like rectangle patch dipole, the antenna is simple in structure and free from using a complex feedback circuit, the height is only 0.13l0, 10dB impedance bandwidth achieves 66.9%, the 3dB AR bandwidth achieves 55.1%, and the average gain in the antenna pass-band is 10.4dBi.

Description

technical field [0001] The invention relates to an antenna in the field of wireless mobile communication, in particular to a low-profile, wide-band, high-gain, circularly polarized cross dipole antenna applicable to mobile communication. Background technique [0002] In recent years, crossed dipole antennas have attracted extensive attention due to their good circular polarization properties. In order to meet the needs of modern wireless communication systems, various wideband crossed dipole antennas have been proposed one after another. There are two main techniques for increasing bandwidth: one is to use various parasitic elements, and the other is to use wider planar dipoles. The antenna bandwidth obtained by these methods is relatively wide, but their profiles are relatively high. High-profile antennas are not suitable for coplanarity and suffer from greater wind resistance. In order to reduce the height of the antenna, artificial magnetic conductor (AMC) is used as t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/50H01Q9/16H01Q19/10
CPCH01Q1/38H01Q1/50H01Q9/16H01Q19/108
Inventor 潘咏梅杨婉军胡鹏飞
Owner SOUTH CHINA UNIV OF TECH
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