Research and Design of a Small Dual Band-notched Ultra Wideband Antenna

In order to improve the bandwidth of wireless communication systems, a small antenna based on microstrip antennas is designed to achieve ultra wideband characteristics by changing the structure of the ground plane, patch, and feed line. Considering the presence of narrowband signals in the ultra wideband frequency band, U-shaped slots and branches are used to effectively suppress the interference of narrowband signals in the WLAN and ITU frequency bands. Studied the band-notched characteristics of the antenna, analyzed the band-notched principle of the antenna, and simulated the directional pattern characteristics and gain characteristics. Compared to existing antennas, this antenna has a simple structure, small size, and superior performance, making it effective for short-distance wireless communication systems. The proposal of dual band-notched ultra wideband antennas effectively solves the interference problem between multi narrowband systems and ultra wideband systems, further enhancing the applicability of communication systems.