US 12,413,208 B2
Method and apparatus for filtering and amplifying higher power communication signals
Andy P. Salvador, Bellevue, WA (US); Mikko Juuso, Oulu (FI); Jani Lyrintzis, Snohomish, WA (US); and Toni Lehtimaki, Oulu (FI)
Assigned to AT&T Intellectual Property I, L.P., Atlanta, GA (US)
Filed by AT&T Intellectual Property I, L.P., Atlanta, GA (US)
Filed on Sep. 15, 2022, as Appl. No. 17/945,785.
Prior Publication US 2024/0097652 A1, Mar. 21, 2024
Int. Cl. H03H 9/64 (2006.01); H03H 9/25 (2006.01); H03H 9/72 (2006.01)
CPC H03H 9/6433 (2013.01) [H03H 9/25 (2013.01); H03H 9/725 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A communication device, comprising:
an antenna;
a transmitter;
a receiver; and
a filtering system comprising a plurality of Surface Acoustic Wave (SAW) filters connected with a plurality of hybrid couplers,
wherein an RF signal is received at the antenna, wherein the RF signal is provided to the receiver via the filtering system,
wherein one or more first hybrid couplers of the plurality of hybrid couplers splits the RF signal from the antenna into a group of RF signals and provides the group of RF signals to the plurality of SAW filters,
wherein the plurality of SAW filters performs filtering of the group of RF signals resulting in a group of filtered RF signals and provides the group of filtered RF signals to one or more second hybrid couplers of the plurality of hybrid couplers,
wherein the one or more second hybrid couplers combines the group of filtered RF signals into a filtered RF signal and provides the filtered RF signal to the receiver,
wherein the plurality of hybrid couplers further comprises one or more third hybrid couplers,
wherein the transmitter provides a second RF signal to the one or more third hybrid couplers,
wherein the one or more third hybrid couplers splits the second RF signal into a group of second RF signals and provides the group of second RF signals to the plurality of SAW filters,
wherein the plurality of SAW filters performs filtering of the group of second RF signals resulting in a group of filtered second RF signals and provides the group of filtered second RF signals to the one or more first hybrid couplers,
wherein the one or more first hybrid couplers combines the group of filtered second RF signals into a filtered second RF signal and provides the filtered second RF signal to the antenna.