Design of a Wideband Antipodal Vivaldi Antenna with High Gain for Detecting Breast Cancer

摘要

In this paper, a novel Antipodal Vivaldi antenna is proposed for microwave imaging system for detecting breast cancer. The proposed antenna is etched side slots to extend the lower operating frequency due to the longer electrical length. In addition, three metal patches are added on the end-fire as the director to increase the gain of the Antipodal Vivaldi antenna. The oversize of the proposed antenna is 70 mm × 79 mm × 1 mm. The proposed antenna is designed to operate in a frequency range of 2.4-13 GHz (more than 13 GHz) for return loss less than -10 dB. The peak gain of the antenna is 9.5 dBi and the radiation pattern is stable over the entire operating band. At last, the simulated breast tumor model is carried out on the antenna. The induced current on the breast tissue shows that the antenna can become a candidate for microwave breast imaging to detect the breast cancer due to its wideband and high directional radiation characteristics.