US 12,255,374 B2
Frequency selective coupler
Yu-Chun Liu, Altamonte Springs, FL (US); Xiaomin Yang, Longwood, FL (US); and Arjun Ravindran, Orlando, FL (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM INCORPORATED, San Diego, CA (US)
Filed on Feb. 25, 2022, as Appl. No. 17/681,306.
Prior Publication US 2023/0275334 A1, Aug. 31, 2023
Int. Cl. H01P 1/212 (2006.01); H01P 5/12 (2006.01); H01P 5/18 (2006.01); H03H 7/01 (2006.01)
CPC H01P 1/212 (2013.01) [H01P 5/12 (2013.01); H01P 5/184 (2013.01); H03H 7/0138 (2013.01)] 27 Claims
OG exemplary drawing
 
1. A frequency selective coupler configured as a harmonic rejection filter, comprising:
an electromagnetic element configured to electromagnetically couple to a signal path between an output of a power amplifier and an antenna;
an impedance network coupled between an isolated port of the coupler and ground, the impedance network configured to provide a harmonic filter response, wherein the impedance network comprises at least one of a resistor, an inductor and a capacitor; and
an electrically unconnected coupled port connected to the electromagnetic element.