Small compass B1 frequency band micro-strip center-fed antenna

Abstract

The invention relates to a small compass B1 frequency band micro-strip center-fed antenna. The antenna comprises a metal radiation unit, a dielectric substrate, a ground plane, a feed port and a probe; the metal radiation unit is installed on the upper surface of the dielectric substrate, the ground plane is installed on the lower surface of the dielectric substrate, the feed port is installed onthe lower surface of the ground plane, feed points are arranged in the metal radiation unit, the dielectric substrate and the ground plane, the probe is connected with the metal radiation unit throughthe feed port, and a probe feed circuit is formed; the metal radiation unit comprises a corner square metal patch, a U-shaped resonant tank is formed in the middle of the corner square metal patch, the center of the U-shaped resonant tank is consistent with the center of the corner square metal patch, the probe is located in the center of the corner square metal patch. Accordingly, the B1 frequency band of a compass system can be completely covered, the structure is simple, the return loss is low, arraying is conducted easily, and due to the fact that the center feed structure is introduced,the antenna obtains low cross polarization and high axial ratio beam width.

Description

technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to a small Beidou B1 frequency band microstrip mid-fed antenna. Background technique [0002] The antenna is a very important part of the terminal of the wireless communication system. It can convert the analog signal and circuit signal in the wireless device into electromagnetic waves and radiate them into the external space. Its performance directly affects the communication quality and performance. Microstrip antennas have the advantages of small size, light weight, and low profile. In the past few decades, circularly polarized microstrip antennas have been widely concerned and applied in the fields of satellite communication and mobile communication. [0003] In recent years, our country's Beidou navigation and positioning system has developed rapidly, so high-performance receivers for navigation satellite signals are needed. The design of the receiving antenna ...

AI Technical Summary

Problems solved by technology

However, the feed point in the offset feed form deviates from the center of the patch, which will introduce large cross polarization levels and spurious radiation

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