小型化超宽带天线设计

With the gradual development of communication devices towards miniaturization, integration and portability, ultra-wideband antennas also need to have the characteristics of small size and easy integration. In addition, since many narrow-band communication frequency bands exist in UWB systems and interfere with their operation, notch characteristics can be added in the design of antennas to avoid their interference. In this paper, a three-notch miniaturized ultra-wideband antenna is designed based on the fractal theory. After simulation by HFSS software, the bandwidth is 3.6~17.6GHz, which realizes the broadband of the antenna; Optimize the size of the branch structure and the narrow slot to generate notches in the three frequency bands of 5.1~6.8GHz, 7.3~7.8GHz, and 8~9.9GHz, which hinders the interference of the three narrowband frequency bands of the C-band communication system, the X-band communication system and the International Telecommunication Union communication system to the ultra-wideband system, realizes the three-notch characteristic;