Square dual-frequency microstrip patch antenna

Abstract

The invention relates to a square dual-frequency microstrip patch antenna. The square dual-frequency microstrip patch antenna comprises a conductive grounding plane, a cube-shaped dielectric substrate, a radiating sheet and a plurality of feed probes which are arranged in turn, wherein the radiating sheet includes a first radiating sheet and a second radiating sheet, the first radiating sheet is a gear-shaped sheet, and the bottom of each tooth slot of the gear-shaped first radiating sheet is processed with a groove at the center; the second radiating sheet is a circular sheet with the outer edge being serrated, the second radiating sheet is greater than the first radiating sheet, the middle part of the second radiating sheet is processed with an opening matched with the first radiating sheet in shape, and the first radiating sheet is arranged in the opening. The square dual-frequency microstrip patch antenna can be fixed extremely stably, adopts a single-layer antenna structure, has simple structure and higher reliability, and is more convenient to process, design and assemble. The processing is simple, the polarization performance of the antenna is improved, the phase center is stable, and the antenna is particularly suitable for precise measurement of the GNSS (Global Navigation Satellite System) and terminal equipment of the positioning system.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a square dual-frequency microstrip patch antenna. Background technique [0002] The current satellite navigation and positioning equipment is widely used in fields such as positioning, measurement, timing, high-precision agriculture and intelligent transportation. In order to obtain high-precision positioning requirements above the decimeter level, navigation equipment generally adopts RTK (real-time dynamic differential method) technology. And axle ratio bandwidth), and more compact size, while processing and manufacturing should be simple. Microstrip patch antennas are widely used because of their small shape, low cost, easy conformality, easy processing, and easy realization of circular polarization. [0003] Traditional microstrip antennas generally implement dual-band by stacking, that is, generally one layer implements a working frequency band, ...

AI Technical Summary

Problems solved by technology

[0006] The invention patent with the patent number US7385555 also uses a single-layer or double-layer microstrip patch antenna design, but the probe directly contacts the feeding method, and in the literature, the axial ratio performance is not improved, which affects the circular polarization of the antenna

After actual simulation and calculation, it is found that the axial ratio performance of the antenna in this paper is relatively poor. In addition, the invention has a narrow working bandwidth and low gain.

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