A Dual Frequency Line-Circular Polarization Directional Antenna

A directional antenna and circular polarization technology, which is applied in antennas, resonant antennas, electrical short antennas, etc., can solve the problems of narrow bandwidth, low gain, and large antenna volume, so as to reduce negative effects, improve front-to-back ratio, and feed structure simple effect

Active Publication Date: 2021-04-20
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problems of large antenna volume, narrow bandwidth and low gain in the prior art, the present invention proposes a dual-band broadband directional antenna with linear polarization and circular polarization characteristics

Method used

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  • A Dual Frequency Line-Circular Polarization Directional Antenna
  • A Dual Frequency Line-Circular Polarization Directional Antenna
  • A Dual Frequency Line-Circular Polarization Directional Antenna

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Embodiment Construction

[0023] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings and the technical solutions of the description.

[0024] see figure 1 , Figure 2 (a), (b), the dual-frequency line-circular polarization directional antenna is composed of the antenna radiator part, two metal reflective walls A8, B9 and a metal cavity 13. The part of the antenna radiator and the floor of the metal cavity 13 are placed 11.3mm apart from each other up and down, and are vertically fixedly connected by nylon columns A14 and B15 at both ends. Metal patches C6 and D7 are symmetrically placed vertically and welded on the metal floor 2, and metal patches A4 and B5 are placed horizontally and connected to metal patches C6 and D7 respectively by vertical welding to form a horizontal dipole structure and have a distance of 9.5 from the metal floor 2. mm, used to form a 90° phase difference. The metal reflective walls A8 and B9 are res...

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Abstract

A dual-frequency line-circularly polarized directional antenna belongs to the technical field of wireless communication and antennas. Including antenna radiator, two metal reflective walls A, B, a coaxial cable, a metal cavity and two nylon columns A, B. The antenna radiator is placed parallel above the metal cavity; the coaxial line vertically connects the radiation antenna and the metal cavity to feed the antenna radiator; two metal reflection walls A and B are respectively set on both sides of the antenna radiator; two Nylon columns A and B are vertically arranged between the upper radiation antenna and the lower metal cavity to support the antenna structure. The invention has a simple structure and is easy to process and manufacture; it can realize dual-frequency linear polarization and circular polarization radiation; it uses a coaxial line and a short-circuit pin as a feeding structure, which reduces the negative influence of the coaxial line on the radiation pattern and can achieve good Impedance matching; the introduction of simple metal reflective side walls and metal cavity structures can effectively reduce the antenna's backward radiation, making the antenna's pattern orientation stable and high gain.

Description

technical field [0001] The invention belongs to the field of wireless communication and antenna technology, and relates to a dual-band directional radiation antenna. Background technique [0002] In recent years, as people's demand for communication systems continues to increase, communication systems with higher data transmission rates are required to support them, which poses greater challenges to the working bandwidth and transmission distance of antennas. Therefore, research on multi-frequency, broadband directional antennas received widespread attention. On the other hand, circular polarization technology has better mobility and adaptability to various environments than linear polarization, which can effectively reduce multipath effects and polarization mismatch, while reducing the inherent complexity of multi-service wireless systems , has been widely used in the field of electronic jamming and communication. In addition, the multi-frequency multi-polarization antenn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/36H01Q1/48H01Q1/50H01Q9/04H01Q9/06H01Q9/16H01Q19/10
CPCH01Q1/36H01Q1/48H01Q1/50H01Q9/0407H01Q9/0492H01Q9/065H01Q9/16H01Q19/106
Inventor 周长飞苑姗姗李慧
Owner DALIAN UNIV OF TECH
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