Broadband near-field filters for Simultaneous Transmit and Receive in a small two-dimensional array

In order to enable Simultaneous Transmit and Receive (STAR), it is essential to provide high isolation between antenna elements. A novel technique is presented here in which tunable resonators are used in the near-field of an array of antennas to provide transmission zeros in the coupling between antennas. By using two sets of tunable resonators between each set of adjacent antennas, it is possible to significantly increase the bandwidth of the isolation provided relative to previous topologies used to give isolation between planar antennas.

[1]  William J. Chappell,et al.  Simultaneous Transmit And Receive with a small planar array , 2012, 2012 IEEE/MTT-S International Microwave Symposium Digest.

[2]  William J. Chappell,et al.  Coupled antenna scheme using filter design techniques and tunable resonators to show simultaneous transmit and receive , 2013, 2013 IEEE MTT-S International Microwave Symposium Digest (MTT).

[3]  Edward I. Ackerman,et al.  Photonics for simultaneous transmit and receive , 2011, 2011 IEEE MTT-S International Microwave Symposium.

[4]  R. J. Cameron,et al.  Advanced Filter Synthesis , 2011, IEEE Microwave Magazine.

[5]  C. Fulton,et al.  Transmit–Receive Duplexing Using Digital Beamforming System to Cancel Self-Interference , 2011, IEEE Transactions on Microwave Theory and Techniques.

[6]  Xinshe Yin.  Accurate extraction of coupling matrix for coupled resonator filters , 2012, 2012 IEEE/MTT-S International Microwave Symposium Digest.