Miniaturized dual-frequency antenna

Abstract

The invention provides a miniaturized dual-band antenna, which comprises a first dipole arm and a second dipole arm which are symmetrical to each other, and a dipole formed by the first dipole arm and the second dipole arm is used for generating a first resonance point; the first dipole arm and the second dipole arm are respectively provided with a first U-shaped groove, the two first U-shaped grooves are mutually symmetrical, openings of the two first U-shaped grooves are opposite, the first U-shaped grooves are used for generating a second resonance point, and the frequency of the first resonance point is different from that of the second resonance point; the two ends, close to each other, of the first dipole arm and the second dipole arm are connected with the feed structure. According to the dual-frequency antenna, a novel dual-frequency structure is adopted, a plurality of slot combinations can be loaded to realize broadband matching at a high frequency band, meanwhile, the dual-frequency antenna has the advantages of miniaturization and high radiation efficiency, and the requirement of a Wifi 6E frequency band can be well met.

Description

technical field [0001] The present invention relates to an antenna in a wireless communication system, in particular to a miniaturized dual-frequency antenna. Background technique [0002] Antenna is an indispensable and important component in wireless communication systems and radar systems. The performance of the antenna determines the performance and quality of the entire wireless system. With the comprehensive advancement of wireless communication technologies represented by 5G and the Internet of Things, there is an urgent need to develop high-quality antenna components suitable for their application scenarios. Wi-Fi antennas are widely used in wireless communication systems, and the demand is very large, especially for low-cost, high-efficiency miniaturized dual-band Wi-Fi antennas. At present, the commonly used Wi-Fi antennas are mainly monopoles and dipoles, including all-metal structures and printed circuit board structures. In addition, the dual-band PIFA antenna...

AI Technical Summary

Problems solved by technology

Antennas loaded with slots are generally difficult to achieve broadband matching in high frequency bands, and cannot cover Wi-Fi6 or Wi-Fi6E frequency bands, resulting in low radiation efficiency

[0005] As far as the commonly used UWB antennas are concerned, UWB monopole antennas are generally used, which have the advantage of wide bandwidth and do not need to consider the problem of frequency offset. However, UWB monopole antennas generally have a large size and require a large Otherwise, there will be current on the feed line that will shift the pattern and may flow into the circuit to affect the chip's work.

[0006] As far as the commonly used all-metal dual-band Wi-Fi antennas are concerned, they are generally processed by laser cutting of metal sheets. The deviation will degrade the performance, especially when the bandwidth is narrow, the frequency deviation will increase and reduce the radiation efficiency, and may also affect the output port of the RF chip

[0007] In addition, as far as the current dual-band implementation method is concerned, multi-twig antennas will lead to an increase in the antenna structure, which is not conducive to the use of small-sized devices

Using a matching circuit to achieve dual frequency generally matches a narrow frequency band, and is prone to frequency deviation due to device tolerances

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