DUAL-FREQUENCY SLOT MIMO ANTENNA BASED ON NEUTRAL LINE

摘要

Disclosed is a dual-frequency slot MIMO antenna based on a neutral line, the antenna comprising two antenna radiators, wherein the bottoms of the two antenna radiators are connected to each other, and an included angle is formed between inner side edges thereof; the two antenna radiators are bilaterally symmetrical about a central axis of the antenna; the inner side edges of the two antenna radiators are connected via a neutral line; a metal layer is laid on an upper surface of a dielectric substrate covered by the two antenna radiators to serve as a metal radio frequency ground; each antenna radiator is composed of a multi-mode slot resonator and a coplanar wave guide feeder line with a T-shaped structure; the multi-mode slot resonator is composed of a folded slot resonator and a coplanar wave guide stepped impedance resonator; the coplanar wave guide stepped impedance resonator is connected to the metal radio frequency ground; and the multi-mode slot resonator is fed via the coplanar wave guide feeder line. In the present invention, a neutral line is used to connect two antenna radiators, thereby improving an antenna isolation degree, and the working frequency of an antenna is tuned by adjusting the length of the neutral line. The antenna has a simple structure and has a high practicability.