US 11,973,490 B2
Non-reciprocal filter
Jose Antonio Bahamonde, New York, NY (US); and Ioannis Kymissis, New York, NY (US)
Assigned to THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK, New York, NY (US)
Filed by The Trustees of Columbia University in the City of New York, New York, NY (US)
Filed on Jan. 15, 2021, as Appl. No. 17/150,579.
Claims priority of provisional application 62/962,378, filed on Jan. 17, 2020.
Prior Publication US 2021/0226609 A1, Jul. 22, 2021
Int. Cl. H03H 9/64 (2006.01); H03F 7/00 (2006.01); H03H 9/02 (2006.01); H03H 9/145 (2006.01); H03H 11/04 (2006.01)
CPC H03H 9/64 (2013.01) [H03F 7/00 (2013.01); H03H 9/02559 (2013.01); H03H 9/145 (2013.01); H03H 9/14505 (2013.01); H03H 11/04 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A filter comprising:
a first port and a second port, wherein an input signal propagates from the first port to the second port;
a third port different from the first and second ports;
a first transmission line connected to the first port and the third port;
a second transmission line connected to the second port and the third port; and
a current source connected to the third port, wherein the current source provides a modulation signal to the third port,
wherein the length of the first transmission line is different from the length of the second transmission line, and
the first and second transmission lines each comprises at least one capacitor and at least one inductor.