US 11,716,110 B2
Compact radio frequency combiner
Amir Agah, Kirkland, WA (US); Eric Pepin, Seattle, WA (US); and Kim W. Schulze, Seattle, WA (US)
Assigned to Space Exploration Technologies Corp., Hawthorne, CA (US)
Filed by Space Exploration Technologies Corp., Hawthorne, CA (US)
Filed on Mar. 24, 2022, as Appl. No. 17/703,766.
Claims priority of provisional application 63/167,578, filed on Mar. 29, 2021.
Prior Publication US 2022/0311467 A1, Sep. 29, 2022
Int. Cl. H04B 1/3805 (2015.01); H04B 1/10 (2006.01); H04B 1/00 (2006.01)
CPC H04B 1/3805 (2013.01) [H04B 1/006 (2013.01); H04B 1/1081 (2013.01); H04B 2001/3811 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A radio frequency input/output (RFIO) circuit comprising:
a receive (Rx) path comprising a first low noise amplifier (LNA) and a second LNA, a first set of switches, a first set of resistors, and a first set of capacitors, wherein a first switch of the first set of switches is in series with a first capacitor of the first set of capacitors and a first resistor of the first set of resistors, and wherein a second switch of the first set of switches is in series with a second capacitor of the first set of capacitors and a second resistor of the first set of resistors;
a transmit (Tx) path comprising a first power amplifier (PA) and a second PA, wherein the first PA comprises a second set of switches coupled to a second set of resistors and a third set of switches coupled to a third set of resistors, wherein the second PA comprises a fourth set of switches coupled to a fourth set of resistors and a fifth set of switches coupled to a fifth set of resistors, and wherein each switch of the second set of switches is in series with one or more of the second set of resistors, each switch of the third set of switches is in series with one or more of the third set of resistors, each switch of the fourth set of switches is in series with one or more of the fourth set of resistors, and each switch of the fifth set of switches is in series with one or more of the fifth set of resistors; and
a balun that couples the Rx path and the Tx path to an RFIO terminal.