A design of high-gain vivaldi antenna loaded with antipodal structure and slotting correction

Vivaldi antenna, a kind of tapered slot antenna, is widely used in the design of planar ultra wideband antennas. Vivaldi antennas can broaden the bandwidth infinitely in theory, but the improvement of the gain is not prominent because of the processing technology and dimension. This letter loads the antipodal structure on the front of the radiation structure. The results indicate that the relative bandwidth broadens by 79.1% and the gain increases 3 dBi at 5.5 GHz and 12 GHz. The technology of slotting correction makes the radiation phrase distribution more symmetrical, enhancing the efficiency of the amplitude distribution. The results indicate that the gain increases 2 dBi through loading the slotting correction. Both of the technology in the design performs high gain, simple design and miniaturization, which provides a new idea for high-gain antenna design and applications in ultra-wideband antenna fields.