Planar UWB antenna array for breast cancer detection

A 4×4 planar ultra-wideband (UWB) antenna array was developed for radar-based breast cancer detection system in the supine position. The the center frequency and the bandwidth of the antenna were 6 GHz and 12.5 GHz, respectively. The size of an antenna element was 11 mm × 13.1 mm. Confocal imaging was perfomed using breast phantoms whose characteristics were close to those of measured tumors, glandular and adipose tissues. The three-dimensional breast tumor images were reconstructed.