US 12,445,164 B2
Shifting a frequency band of an interference signal out of a pass band of a signal path
Daniel Schwab, Gersthofen (DE); and Peter Schmid, Marxheim-Neuhausen (DE)
Assigned to Andrew Wireless Systems GmbH, Buchdorf (DE)
Appl. No. 17/802,498
Filed by Andrew Wireless Systems GmbH, Buchdorf (DE)
PCT Filed Feb. 5, 2021, PCT No. PCT/EP2021/052883
§ 371(c)(1), (2) Date Aug. 25, 2022,
PCT Pub. No. WO2021/170379, PCT Pub. Date Sep. 2, 2021.
Claims priority of provisional application 62/981,205, filed on Feb. 25, 2020.
Prior Publication US 2023/0145768 A1, May 11, 2023
Int. Cl. H04B 1/10 (2006.01); H04B 1/525 (2015.01)
CPC H04B 1/525 (2013.01) [H04B 2001/1054 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A communication circuit, comprising:
a first signal path configured to carry, during a first period, a first information signal having a first frequency; and
a first frequency-shifting circuit coupled to the first signal path and configured to:
receive a first control signal;
shift the first frequency of the first information signal by a second frequency in response to the first control signal having a first control value; and
shift a third frequency of a first interference signal on the first signal path during a second period by a fourth frequency in response to the first control signal having a second control value;
wherein the first frequency-shifting circuit includes an output node configured to carry the frequency-shifted first information signal during the first period and the frequency-shifted interference signal during the second period;
wherein the first signal path includes:
a bandpass filter having an input node coupled to the output node of the first frequency-shifting circuit and having an output node;
an amplifier having an input node coupled to the output node of the bandpass filter and having an output node; and
an antenna coupled to the output node of the amplifier.