This document reviews different antenna types used in Through-The-Wall Radar Imaging (TTWRI) systems. It discusses that Vivaldi and horn antennas are most commonly used due to their wide bandwidth and high directivity. The review examines several papers that implemented TTWRI systems using antennas such as Vivaldi arrays, horn arrays, Archimedean spirals, and patch antennas across frequency bands from 0.5-10 GHz. Key antenna properties for TTWRI discussed are return loss below -10 dB, gain above 8 dB, and side lobe levels below -10 dB. The document concludes antennas should have low frequency, high gain, low side lobes, and be lightweight for optimal TTWRI performance.