An analog canceller circuit is added to a commercial off the shelf COTS magnetic circulator. Barium-strontium-Titanate BST tunable capacitors adjust the return loss at the antenna port to reflect signal back into the circulator with the proper amplitude and phase to cancel transmit leakage at the receive port. The circuit increases the isolation by 20-22dB over a 37.5MHz bandwidth with 0.4dB of additional insertion loss. The 950MHz center frequency can be scaled to other frequencies.
GOMACTech Conference (GOMACTech 19) , 25 Mar 2019, 28 Mar 2019, See also AD1074821 - GOMACTech Conference (GOMACTech 19) "Artificial Intelligence and Cyber Security: Challenges and Opportunities for the Government" held in Albuquerque, NM 25-28 March 2019.