US 11,711,068 B2
Low loss reflective passive phase shifter using time delay element with double resolution
John Birkbeck, New Milton (GB); Vikas Sharma, Reading (GB); Kashish Pal, Reading (GB); and Mark James O'Leary, San Diego, CA (US)
Assigned to pSemi Corporation, San Diego, CA (US)
Filed by pSemi Corporation, San Diego, CA (US)
Filed on Nov. 10, 2020, as Appl. No. 17/94,654.
Application 17/094,654 is a continuation of application No. 16/372,194, filed on Apr. 1, 2019, granted, now 10,840,889.
Application 16/372,194 is a continuation in part of application No. 16/052,337, filed on Aug. 1, 2018, abandoned.
Application 16/052,337 is a continuation in part of application No. 14/988,463, filed on Jan. 5, 2016, granted, now 10,062,946, issued on Aug. 28, 2018.
Prior Publication US 2021/0135656 A1, May 6, 2021
Int. Cl. H03H 11/20 (2006.01); H03H 11/26 (2006.01); H03H 17/08 (2006.01); H03H 17/00 (2006.01)
CPC H03H 11/20 (2013.01) [H03H 11/265 (2013.01); H03H 17/0009 (2013.01); H03H 17/0054 (2013.01); H03H 17/08 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A reflective passive phase shifter including:
(a) a radio frequency coupler having an input port, a direct port, a coupled port, and an isolation port;
(b) a first artificial transmission line coupled to the direct port and having a selectable electrical length;
(c) a second artificial transmission line coupled to the coupled port and having a selectable electrical length; and
(d) a ground conductor encircling at least the radio frequency coupler.