Multi-frequency antenna

Abstract

The invention relates to a multi-frequency antenna, which comprises a ground plane, a radiation conductor, a parasitic conductor and a feed-in wire, wherein the radiation conductor comprises a feed-in part, a first radiation arm and a second radiation arm; the feed-in wire comprises a central wire and an external wire; the feed-in part is provided with a coupling edge; the parasitic conductor is connected with the ground plane and provided with a coupling edge which is arranged along a profile of the coupling edge of the feed-in part, and a gap is formed between the coupling edge of the parasitic conductor and the coupling edge of the feed-in part; the central wire is connected with the feed-in part; and the external wire is connected with the ground plane. The low-frequency resonance mode is excited through the first radiation arm and the second radiation arm and the high-frequency resonance mode is excited through the parasitic conductor, so that an antenna system integrally covers various operation frequency bands and has the characteristic of ultra wide band; and simultaneously the composition structure of the antenna is simplified.

Description

technical field [0001] The invention relates to a multi-frequency antenna, in particular to an antenna system that integrates and covers ultra-wideband technical characteristics. Background technique [0002] With the advent of the wireless communication era, antenna products with light weight, small size, good reception, and low cost will become the mainstream of the market. Dual-band antennas are miniaturized antennas. Two resonant frequencies are produced. The known dual-frequency antenna is usually a combination of two or more different antenna types. For example, the dual-frequency antenna structure disclosed in U.S. Patent No. 6,204,819 combines a planar inverted-F antenna and a loop antenna. Select different signal feed-in methods to switch between the two antennas. However, the antenna is a three-dimensional structure, which is bulky and difficult to configure. In addition, a switching chip must be added to operate the frequency band switching, resulting in a comple...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a multi-frequency antenna, which uses the first radiating arm and the second radiating arm to excite the low-frequency resonance mode, and the parasitic conductor excites the high-frequency resonance mode, so that the integration of the antenna system covers a variety of operating frequency bands and has ultra-wideband characteristics, improving the miniaturization of known antennas can not take into account the lack of high bandwidth (bandwidth) at the same time

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