US 11,791,800 B2
Apparatus and methods for phase shifting
Mostafa Azizi, Stittsville (CA); and Hassan Sarbishaei, Ottawa (CA)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by Skyworks Solutions, Inc., Irvine, CA (US)
Filed on Nov. 16, 2021, as Appl. No. 17/455,086.
Claims priority of provisional application 63/199,397, filed on Dec. 23, 2020.
Prior Publication US 2022/0200577 A1, Jun. 23, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H03H 11/16 (2006.01); H04B 3/20 (2006.01); H04L 27/00 (2006.01)
CPC H03H 11/16 (2013.01) [H04B 3/20 (2013.01); H04L 27/0002 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A phase shifter comprising:
a coupler including an input terminal, a thru terminal, a first coupled line connected between the input terminal and the thru terminal, an isolation terminal, a coupling terminal, and a second coupled line connected between the isolation terminal and the coupling terminal;
an input port connected to the input terminal of the coupler and configured to receive a radio frequency input signal;
an output port connected to the coupling terminal of the coupler and configured to output a radio frequency output signal having a phase shift with respect to the radio frequency input signal; and
a first controllable reflective load connected to the thru terminal of the coupler and including a transmission line and a plurality of shunt switches each connected between a ground voltage and a different point along the transmission line, the plurality of shunt switches selectable to control the phase shift, the plurality of shunt switches connected to the transmission line at a plurality of points that are non-uniformly spaced.