US 11,838,050 B2
Distributed array for direction and frequency finding
Janusz Murakowski, Bear, DE (US); Christopher Schuetz, Avondale, PA (US); Garrett Schneider, New Castle, DE (US); and Shouyuan Shi, Newark, DE (US)
Assigned to Phase Sensitive Innovations, Inc., Newark, DE (US)
Filed by Phase Sensitive Innovations, Inc., Newark, DE (US)
Filed on Jan. 18, 2021, as Appl. No. 17/151,565.
Application 16/430,877 is a division of application No. 15/956,545, filed on Apr. 18, 2018, granted, now 10,313,012, issued on Jun. 4, 2019.
Application 17/151,565 is a continuation of application No. 16/430,877, filed on Jun. 4, 2019, granted, now 10,897,309.
Application 15/956,545 is a continuation in part of application No. 15/227,859, filed on Aug. 3, 2016, granted, now 10,009,098, issued on Jun. 26, 2018.
Claims priority of provisional application 62/486,474, filed on Apr. 18, 2017.
Claims priority of provisional application 62/200,626, filed on Aug. 3, 2015.
Prior Publication US 2021/0242941 A1, Aug. 5, 2021
Int. Cl. H04B 10/2575 (2013.01); H04B 10/69 (2013.01); H04B 10/00 (2013.01)
CPC H04B 10/2575 (2013.01) [H04B 10/00 (2013.01); H04B 10/69 (2013.01); H04B 2210/006 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A receiver system comprising:
a plurality of antennas;
a plurality of electro-optic modulators each connected to a corresponding one of the plurality of antennas to upconvert a radio frequency (RF) electrical signal provided by the corresponding antenna to the optical domain and output a corresponding optical signal;
a plurality of first optical fibers operatively connected through corresponding ones of the electro-optic modulators to first antennas of the plurality of antennas, the first antennas comprising some or all of the plurality of antennas, the first optical fibers forming a first optical bundle;
a plurality of second optical fibers operatively connected through corresponding ones of the electro-optic modulators to second antennas of the plurality of antennas, the second antennas comprising some of the plurality of antennas, the second optical fibers forming a second optical bundle; and
an optical processor comprising at least one interference space and at least one photodetector,
wherein the first optical bundle terminates at the at least one interference space to provide a first optical image of an RF scene captured by the plurality of antennas to the at least one photodetector,
wherein the second optical bundle terminates at the at least one interference space to provide a second optical image of the RF scene captured by the plurality of antennas to the at least one photodetector,
wherein the first antennas, the first optical bundle and the optical processor form a first imaging receiver having a first RF imaging axis, and
wherein the second antennas, the second optical bundle and the optical processor form a second imaging receiver having a second RF imaging axis that is different from the first RF imaging axis.