Circularly polarized antenna and wearable device

CN122931291APending Publication Date: 2026-10-16GUANGDONG XIAOTIANCAI TECH CO LTD +1
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Patent Information

Application Number
CN202510420240.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-03
Publication Date
2026-10-16

AI Technical Summary

Technical Problem

[0004]本申请实施例公开了一种圆极化天线及穿戴设备，能够解决目前圆极化天线的圆极化效果欠佳的问题

Benefits of technology

[0024]In this application, the circularly polarized antenna includes a ground plane, a feed element, a first radiator, and a second radiator. The first coupling end of the feed element is connected to the feed port on the ground plane. The two ends of the first radiator are respectively connected to the second coupling end of the feed element and the ground plane. The second radiator is connected to the second coupling end. When the first and second radiators resonate in the operating frequency band, the electrical signals on the first and second radiators satisfy the condition that the resonance amplitudes are equal and the resonance phases differ by 90 degrees, thus satisfying the circular polarization characteristics. Since the grounding end of the first radiator, which is far from the feed element, is connected to the ground plane, the first radiator is grounded. Furthermore, when the circularly polarized antenna is working, the current intensity at the grounding end of the first radiator is relatively large. This means that not only are there currents in the antenna stubs (the first and second radiators), but there is also a certain amount of current on the ground plane, and the current distribution on the left and right sides is relatively uniform, making the circular polarization pattern more symmetrical and stable, thereby improving the circular polarization effect of the circularly polarized antenna.

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Abstract

The application relates to the technical field of antennas, in particular to a circularly polarized antenna and a wearable device. The circularly polarized antenna comprises a ground plate with a feeding port; a feeding body with a first coupling end and a second coupling end, the first coupling end being electrically connected with the feeding port; a first radiation body, one end of the first radiation body being connected with the second coupling end, and the other end being connected with the ground plate; and a second radiation body, one end of the second radiation body being connected with the second coupling end, and the other end being spaced apart from the ground plate, the second radiation body and the first radiation body being respectively located on two sides of the feeding body along the circumference of the ground plate. The first radiation body is grounded, so that when the circularly polarized antenna works, the current intensity of the grounded end of the first radiation body is large, that is to say, not only is there current on the antenna branch, but there is also certain current on the ground plate, and the current distribution on the left and right sides is relatively uniform, so that the circularly polarized pattern is more symmetrical and stable, and the circularly polarized effect of the circularly polarized antenna is improved.
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