Wide-beam UWB (ultra wide band) dual-circular-polarization log-periodic antenna

A logarithmic periodic antenna and dual circular polarization technology, which is applied in the direction of antenna, antenna grounding switch structure connection, radiation element structure, etc., can solve the problem that there is no ultra-wideband dual-polarization balanced feeding scheme, and it is impossible to obtain wide beams with ultra-wideband Characteristics and other issues, to meet the requirements of ultra-wideband and wide beam, solve technical problems, and achieve the effect of compact overall structure

Inactive Publication Date: 2018-01-19
XIDIAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] To sum up, the problem existing in the prior art is that there is no antenna capable of realizing the ultra-wideband dual circular polarization characteristic with wide beam characteristics, and the existing ultra-wide...

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  • Wide-beam UWB (ultra wide band) dual-circular-polarization log-periodic antenna
  • Wide-beam UWB (ultra wide band) dual-circular-polarization log-periodic antenna
  • Wide-beam UWB (ultra wide band) dual-circular-polarization log-periodic antenna

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] The invention is provided with an ultra-broadband radiator and a reflective cavity; the ultra-broadband radiator is composed of four ultra-broadband radiation oscillator clusters with the same shape and centered rotationally symmetrical; each ultra-broadband radiation oscillator cluster is composed of It is composed of a plurality of horizontal vibrators and a central assembly line for feeding, wherein every two adjacent horizontal vibrators are placed orthogonally. The reflective cavity is placed on the shorter side of the ultra-broadband radiation oscillator cluster, and placed at a certain distance from the antenn...

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Abstract

The invention belongs to the technical field of dual-circular-polarization antennas, and discloses a wide-beam UWB (ultra wide band) dual-circular-polarization log-periodic antenna. The antenna is provided with a UWB radiator and a reflection cavity. The UWB radiator is located at the upper part of the antenna. The reflection cavity is coaxial with the UWB radiator, and is located at the lower part of the antenna. The reflection cavity and the UWB radiator are arranged at an interval. The interior of the reflection cavity is provided with two UWB feed Baluns and one UWB 3dB bridge, and a wirepasses through a through hole on the upper surface of the reflection cavity to achieve the feed of the UWB radiator. Line impedance bandwidth reaches three frequency multiplications or more, and the broadband half-power wave beam width is greater than 110 degrees. The gain of the radiation main lobe of the antenna is 0dBic or more within 130 degrees. The antenna is compact in overall structure, isexcellent in performance, and is suitable for a high-performance wireless communication system.

Description

technical field [0001] The invention belongs to the technical field of dual circular polarization antennas, in particular to a wide-beam ultra-wideband dual circular polarization logarithmic periodic antenna. Background technique [0002] Linearly polarized waves are prone to polarization deflection during transmission, resulting in attenuation of signal transmission. When the circularly polarized wave is incident on a symmetrical target (such as a plane, a spherical surface, etc.), the polarization of the electromagnetic wave will not change, and it has strong anti-interference ability and anti-rain and fog ability, so the circular polarization working method is used by satellite navigation, communication , identification, detection and other systems are widely used. The dual circularly polarized antenna can transmit or receive two orthogonally polarized electromagnetic waves, so in the same frequency band, the antenna can transmit or receive two signals at the same time. ...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/50H01Q15/24H01Q19/17
Inventor 陈曦余芃佳王学阳赵书宽卜德文傅光
Owner XIDIAN UNIV
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