Single-fed dual-bandwidth wave beam circular polarization antenna

Abstract

The invention discloses a single-fed dual-bandwidth wave beam circular polarization antenna which comprises a metal floor (1), two layers of dielectric slabs (2), a radiation paster (3), a coaxial feed unit (4) and a metal bracket (5), wherein the radiation paster (3) comprises a coupling radiation paster (3a), from which a triangular corner is cut, and a main radiation paster (3b); complementary opening resonance rings (6) are etched on the main radiation paster (3b) and embedded with one another; the central points of the complementary opening resonance rings (6) are overlapped, and the opening directions are opposite; the main radiation paster (3b) is printed on the upper surfaces of the dielectric slabs (2); the coupling radiation paster (3a) is printed on the middle plane of the two layers of dielectric slabs (2); the coaxial feed unit (4) is arranged in the two layers of dielectric slabs (2) in a deviation manner; and the metal bracket (5) is symmetrically arranged on the four corners of the two layers of dielectric slabs (2). The dual-bandwidth circular polarization antenna with the characteristics of wide wave beam, high gain and low coupling is realized and can be applied to satellite communication.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular a high-gain single-feed dual-band wide-beam circularly polarized antenna working in the ultra-high frequency S radar band and the ultra-high frequency C radar band. Background technique [0002] In recent years, with the development of radar detection, global positioning system, radio frequency identification technology, and personal mobile communication, dual-band dual-polarization antennas have attracted widespread attention. Usually, the quality of a wireless communication system depends on the antenna, transmitter power and spectrum, receiver sensitivity, signal processing, etc., and the antenna plays a key role. According to the needs of modern communication, an important direction of antenna development is multi-functionality, such as multi-band, multi-polarization and multi-purpose. The initial target of the dual-band antenna is the mobile phone antenna compatible with the ...

AI Technical Summary

Problems solved by technology

In the research, the method of etching the aperture is mostly used to realize the dual-band and circular polarization characteristics of the antenna. Although the structure of this antenna is simple and easy to realize, the general gain is relatively low, the polarization beam is relatively narrow, and the structure of the defect is also It is easy to cause back radiation, resulting in a decrease in antenna radiation efficiency

Some researchers use the short-circuit method, the purpose of which is to change the resonant frequency of the fundamental mode or high-order mode, so as to achieve the dual-band characteristics according to the design requirements. One of its typical forms is the planar inverted F antenna, which is widely used in mobile phones. Terminal, its disadvantage is that the circular polarization characteristics are difficult to achieve

Some studies have introduced a double-layer radiation patch structure, which is generally fed through two ports to achieve dual-polarization characteristics. This method will effectively improve the radiation characteristics of the antenna and provide support for the miniaturization of the antenna. However, dual-port feeding will increase the complexity of the antenna itself, and the coupling between ports is difficult to remove, which increases the cost of the antenna and the difficulty of debugging to a certain extent.

Due to the shortcomings of the above methods, their application in the field of satellite communication is limited.

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