A dual-frequency antenna and antenna array

Abstract

The invention discloses a dual-frequency antenna and an antenna array. The dual-frequency antenna includes: a dielectric substrate and a fan-shaped vibrator; the fan-shaped vibrator includes two fan-shaped arms, wherein each fan-shaped arm consists of a The fan-shaped patch and an arc-shaped patch are composed, the fan-shaped patch and the arc-shaped patch are connected through an inductor, and the other end of the fan-shaped patch is connected to the capacitor structure; the capacitor structure is located in the middle of the fan-shaped vibrator, and consists of two It consists of parallel patches, and the two parallel patches are respectively located at opposite positions on the front and back of the dielectric substrate; the fan-shaped patch and the arc-shaped patch are connected through an inductor, so as to realize dual-frequency operation. In this way, the present invention can realize dual-frequency operation with only one vibrator, effectively reducing the overall size of the dual-frequency antenna. In addition, the dual-frequency antenna provided by the present invention may further include a parasitic unit, and a switch is loaded in the middle of the parasitic unit, and the effect of the parasitic unit is changed by controlling the switch to be turned on and off, so as to realize pattern reconstruction.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and more specifically relates to a dual-frequency antenna and an antenna array. Background technique [0002] Due to the wide use of wireless LAN, the 2.4GHz frequency band is overloaded, so it needs to be expanded to 2.4GHz and 5GHz dual frequency bands. However, the existing dual-frequency antenna often needs to be realized by two vibrators, and the volume is relatively large, which is not conducive to the integration of the entire antenna. [0003] With the development of wireless communication systems, pattern reconfigurable antennas have been widely studied. Pattern reconfigurable antennas can reduce interference, improve security, and reduce energy loss by directional transmitting signals. Dual-band pattern reconfigurable antennas are the technology for this need. [0004] The reconfigurable antenna can change the current distribution of the antenna to make it have multipl...

AI Technical Summary

Problems solved by technology

[0007] However, there are still many deficiencies in the existing optically controlled microwave switches. For example, compared with MEMS switches, they have higher insertion loss. The excitation light source needs to use lasers, which is not conducive to cost control. Therefore, it is necessary to study how to improve the optically controlled microwave switches. electrical properties

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