Double-frequency antenna and antenna array

Abstract

The invention discloses a double-frequency antenna and an antenna array. The double-frequency antenna comprises a dielectric substrate and a fan-arc-shaped oscillator; the fan-arc-shaped oscillator comprises two fan-arc-shaped arms, each fan-arc-shaped arm is composed of a fan-shaped patch and an arc-shaped patch, the fan-shaped patches are connected with the arc-shaped patches through inductors,and the other ends of the fan-shaped patches are connected with the capacitor structure; the capacitor structure is located in the middle of the fan-arc-shaped oscillator and is composed of two parallel patches, and the two parallel patches are located at the opposite positions of the front face and the back face of the dielectric substrate respectively. The fan-shaped patches and the arc-shaped patches are connected through the inductors, and therefore double-frequency work is achieved. Therefore, the dual-frequency antenna can realize dual-frequency work only by adopting one oscillator, andthe overall size of the dual-frequency antenna is effectively reduced. Furthermore, the dual-frequency antenna provided by the invention can also comprise a parasitic unit, a switch is loaded in the middle of the parasitic unit, and the action of the parasitic unit is changed by controlling the on-off of the switch, so directional diagram reconstruction is realized.

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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