A dual broadband dual circular polarization measuring antenna

Abstract

The invention relates to the technical field of antennas, in particular to a dual-broadband dual-circular polarization measuring type antenna, which is composed of a double-layer patch antenna, a monopole circular array and a three-dimensional choke slot structure, has a compact structure and a stable phase center, and remarkably improves the low elevation angle gain of the antenna through the design of the monopole circular array. Through the design of double-layer circular patch with different sizes, It has good low elevation gain in two wide frequency bands, and can effectively suppress thebacklobe and reduce the influence of multipath effect by installing three-dimensional choke slot on the back of the two-layer patch antenna based on the theory of metal corrugated surface. It improves the satellite navigation measurement accuracy from the antenna end of the system, and has strong practicability.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a dual wideband dual circular polarization measuring antenna. Background technique [0002] Satellite navigation high-precision measurement technology has been more and more widely used in economic construction and science and technology fields. As an important part of the high-precision satellite navigation receiver, the measurement antenna has a direct impact on the measurement accuracy of the satellite navigation receiver. The low elevation gain of the antenna affects the sensitivity of the receiver. Good axial ratio characteristics help to suppress multipath and improve measurement accuracy. The dual-interface output of the dual-frequency antenna can reduce the influence on the antenna gain at the same sensitivity. Require. These requirements bring about difficulties in antenna design. The stability of the antenna phase center is directly related to the number of feeding ...

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Problems solved by technology

These requirements create difficulties in antenna design

The stability of the antenna phase center is directly related to the number of feeding positions. The more feeding positions, the more stable the phase center, but it will make the feeding network complex; in order to suppress the multipath effect, the antenna needs to have a more ideal hemispherical radiation direction Figure, that is, this requires reducing the antenna back lobe, improving the low elevation gain and polarization purity of the antenna, but the low elevation gain and the antenna back lobe are contradictory in the conventional multipath suppression design;

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