Wideband dual mode monostatic simultaneous transmit and receive antenna system
A novel wideband monostatic simultaneous transmit and receive (STAR) antenna system based on eight arm equiangular spiral aperture is proposed. The eight arm STAR spiral is configured such that four arms are used for transmitting and the other four arms for receiving. The multi mode characteristics of the four arm spiral aperture along with applied excitation enable high TX/RX isolation for diverse circular polarization modes of radiation (i.e. broadside and split beam modes) The operational principles of the proposed system are discussed and the feasibility thereof is demonstrated computationally and experimentally. System isolation >40dB is obtained over 8:1 bandwidth for different modes of operation while maintaining similar high quality TX/RX radiation characteristics.
2016 IEEE International Symposium on Antennas and Propagation (APSURSI)