Circularly polarized angle diversity antenna

Abstract

The invention discloses a circularly polarized angle diversity antenna which comprises an upper medium plate, a lower medium plate, a first folding metal line, a second folding metal line, metal columns and a metal plate ground, wherein the first folding metal line is printed on the upper surface of the upper medium plate and the lower surface of the lower medium plate; the part of the first folding metal line on the upper medium plate and the part of the first folding metal line on the lower medium plate are connected through four metal columns; the first folding metal line feeds power through the metal columns in the center; the second folding metal line is printed on the lower medium plate; the second folding metal line comprises a serial feed network, a first L-shaped monopole, a second L-shaped monopole, a third L-shaped monopole and a fourth L-shaped monopole; a horizontal omnidirectional circularly polarized radiation direction graph is provided through the first folding metal line; a zenithal circularly polarized radiation direction graph is provided through the second folding metal line; with the combination of the two radiation direction graphs, circularly polarized coverage of an upper semispherical surface can be provided through the antenna. The antenna has the advantages of small size, low profile, wide band and easiness in manufacturing, and is applicable to design of vehicle-mounted satellite communication.

Description

technical field [0001] The invention belongs to the technical field of antenna design of wireless communication technology, and relates to a circular polarization angle diversity antenna. Background technique [0002] With the rapid development of wireless communication technology, satellite communication and navigation systems have been extensively researched and applied. As a device for sending and receiving electromagnetic waves, the performance of the antenna directly determines the performance of the entire wireless communication system. Antennas for satellite communications typically need to meet two requirements. The first is that the polarization is circular. This is because the polarization direction of electromagnetic waves will rotate when passing through the ionosphere, and circular polarization is needed to overcome this Faraday rotation effect. The second is low elevation coverage. This is because the satellite usually moves relative to the earth, and withi...

AI Technical Summary

Problems solved by technology

However, low elevation coverage is at the expense of increased antenna height, and th

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