Circularly polarized antenna

Abstract

The invention relates to a circularly polarized antenna. The antenna comprises an ideal magnetic conductive layer; a second-layer dielectric plate, positioned on the upper surface of the ideal magnetic conductive layer; a feeder line, printed on the upper surface of the second dielectric plate; a third-layer dielectric plate, positioned on the upper surface of the second-layer dielectric plate; a first thin metal layer, arranged on the upper surface of the third-layer dielectric plate, and a rectangular gap being formed in the first thin metal layer; a fourth-layer dielectric plate, positioned on the upper surface of the third-layer dielectric plate; a circularly polarized radiation patch, arranged on the upper surface of the fourth-layer dielectric plate; and a fifth-layer dielectric plate, positioned on the upper surface of the fourth-layer dielectric plate. According to the antenna, multipath scattering and Faraday rotation effects can be inhibited, and bandwidth expansion and gain improvement can be realized.

Description

technical field [0001] The invention relates to the field of antennas, in particular to a circularly polarized antenna. Background technique [0002] Explosive growth of population and communication equipment has led to rapid development of communication technology. In recent years, in order to increase system capacity, improving current spectrum utilization efficiency and utilizing higher spectrum resources have become two main research directions in the industry today. However, the increasingly saturated allocation of low-frequency spectrum resources limits the improvement of system capacity. Therefore, the development and utilization of high-frequency resources has become an inevitable trend in the development of the communication industry. The rapid development of wireless communication systems has also put forward higher requirements for the hardware systems that support it. [0003] Therefore, with the rapid development of 5G communication systems, various technolog...

AI Technical Summary

Problems solved by technology

As we all know, although the ridge-gap waveguide (RGW) has improved the size of the traditional rectangular waveguide, it still has problems such as bulky structure and narrow axial ratio bandwidth, which is difficult to meet the integration and miniaturization requirements of modern radio frequency circuits.

Substrate integrated waveguide (SIW) has solved many problems of millimeter wave with mature technology and theory, but because SIW cannot transmit TEM mode, and its size is limited by the cut-off frequency of waveguide, the design is inflexible

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