GNSS (Global Navigation Satellite System) multi-arm spiral antenna and GNSS receiver

Abstract

The invention relates to a GNSS (Global Navigation Satellite System) multi-arm spiral antenna and a GNSS receiver. The GNSS multi-arm spiral antenna comprises a supporting medium body and four spiralarm sub-assemblies, wherein the spiral arm sub-assemblies are spirally wound on a side wall of the supporting medium body in the same direction; the adjacent spiral arm sub-assemblies are spaced apartfrom each other; and each of the spiral arm sub-assemblies includes a short-circuit arm and an open-circuit arm wound on the side wall of the supporting medium body. According to the above-mentionedGNSS multi-arm spiral antenna, since an alternate arrangement structure of one ground arm and one feed arm is adopted, the coupling performance between different spiral arm sub-assemblies can be minimized, and the antenna performance index is improved, thereby achieving miniaturization and high performance. In addition, one of the short-circuit arm and the open-circuit arm is a high-frequency radiation arm, and the other of the short-circuit arm and the open-circuit arm is a low-frequency radiation arm; dual-frequency reception can be realized, and the GNSS multi-arm spiral antenna can be usedas a dual-frequency GNSS multi-arm spiral antenna.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a GNSS multi-arm helical antenna and a GNSS receiver. Background technique [0002] GNSS receiving antennas used in the surveying industry have high requirements for phase center accuracy and stability. Based on the principle of performance first, such GNSS receiving antennas often have a large structure. However, GNSS receiving antennas in agriculture or other pan-precision measurement fields have slightly lower requirements for positioning accuracy. For this type of terminal equipment, miniaturization and portability are the main considerations. The GNSS receiving antenna is usually designed as a built-in structure or an external structure. Among them, for the built-in structure, the compatibility of the whole machine is mainly considered. However, the antenna radiation space is limited inside, and the high dielectric coefficient patch ceramic antenna is usually selected...

AI Technical Summary

Problems solved by technology

Among them, for the built-in structure, the compatibility of the whole machine is mainly considered. However, the antenna radiation space is limited inside, and the high dielectric coefficient patch ceramic antenna is usually selected. This type of antenna has low passive gain and adopts single-feed or double-feed design. , poor circular polarization

For an external structure, the antenna needs to be connected to the terminal device through a radio frequency adapter, resulting in a bloated structure

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