Long-sleeved shirt-shaped opening tuning ring low-elevation angle high-gain Beidou multi-frequency microstrip antenna

Abstract

The long-sleeve shirt-shaped opening tuning ring low-elevation-angle high-gain Beidou multi-frequency microstrip antenna relates to a multi-frequency microstrip antenna. There is an upper dielectric substrate, a lower dielectric substrate and a metal back cavity; the upper surface of the upper dielectric substrate is provided with an upper layer patch, and the upper layer patch is a circular ring loaded with four symmetrically distributed long-sleeved shirt-shaped openings. Shaped radiation patch, the top and bottom of the circular radiation patch are provided with arc-shaped protrusions, which can widen the impedance bandwidth of the antenna; between the long-sleeved shirt-shaped opening tuning rings, there are holes that can guide the flow of surface currents. T-shaped gap; the upper surface of the lower dielectric substrate is provided with a lower patch, and the lower patch is a circular patch with arc-shaped grooves cut at the left and right ends respectively; the upper patch is compared The patch on the lower layer is placed eccentrically to the right to effectively realize the impedance matching of the single-feed stacked multi-frequency antenna; the metal back cavity is a metal cavity with an inclined reflective surface, which can improve the gain of the antenna at low elevation angles. It can significantly improve the gain of the low elevation angle of the antenna, thereby improving the positioning accuracy of the system.

Description

technical field [0001] The invention relates to a multi-frequency microstrip antenna, in particular to a long-sleeved shirt-shaped opening tuning ring low elevation angle high-gain Beidou multi-frequency microstrip antenna suitable for Beidou satellite navigation system. Background technique [0002] The Beidou satellite navigation system is a satellite navigation system that the Chinese government is developing and aims to form a global coverage capability. Its appearance and gradual improvement have greatly promoted the development of my country's satellite navigation-related industries. The National Aeronautics Administration of China launched the first Beidou first-generation satellite in 2000, and began construction of the Beidou satellite navigation system (Beidou-2) in 2007. services, and plans to form a global coverage capability in 2020. With the rapid development of science and technology, the space-time information service based on the satellite navigation system...

AI Technical Summary

Problems solved by technology

[0006] In recent years, although there have been many research results on multi-frequency microstrip antennas applied to satellite navigation systems, they mainly focus on dual-frequency antennas, which are compatible with the three frequency bands of Beidou L, S and B3 and have low elevation angle and high gain characteristics. There are few successful examples of microstrip antennas

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