US 11,677,535 B2
Concurrent communication in multiple TDD bands
Ming Sun, Mountain View, CA (US); and Fei He, Sunnyvale, CA (US)
Assigned to Google LLC, Mountain View, CA (US)
Filed by Google LLC, Mountain View, CA (US)
Filed on Apr. 16, 2021, as Appl. No. 17/233,075.
Claims priority of provisional application 63/167,821, filed on Mar. 30, 2021.
Prior Publication US 2021/0297227 A1, Sep. 23, 2021
Int. Cl. H04L 5/26 (2006.01); H04L 5/14 (2006.01); H04B 1/44 (2006.01)
CPC H04L 5/26 (2013.01) [H04B 1/44 (2013.01); H04L 5/14 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A system comprising:
at least four antennas that support communication in a first frequency band and a second frequency band;
an RF modem module comprising:
a transceiver port to transmit uplink communications and receive downlink communications in the first frequency band and the second frequency band; and
at least three receive ports to receive respective communications in the first frequency band and the second frequency band;
transceiver circuitry coupling the at least four antennas to the RF modem module, the transceiver circuitry comprising:
a transceiver chain that comprises:
a first switch with a common terminal coupled to the transceiver port, a first switched terminal coupled to a first of the four antennas through a first bandpass filter for the first frequency band, and a second switched terminal coupled to the first antenna through a second bandpass filter for the second frequency band;
a second switch with a common terminal coupled to the transceiver port, a first switched terminal coupled to the first antenna through the first bandpass filter, and a second switched terminal coupled to the first antenna through the second bandpass filter;
a first receive chain that comprises a third switch with a common terminal coupled to a second receive port, a first switched terminal coupled to a second antenna through a third bandpass filter for the first frequency band, and a second switched terminal coupled to the second antenna through a fourth bandpass filter for the second frequency band;
a second receive chain that comprises a fourth switch with a common terminal coupled to a third receive port, a first switched terminal coupled to a third antenna through a fifth bandpass filter for the first frequency band, and a second switched terminal coupled to the third antenna through a sixth bandpass filter for the second frequency band; and
a third receive chain that comprises a fifth switch with a common terminal coupled to a fourth receive port, a first switched terminal coupled to a fourth antenna through a seventh bandpass filter for the first frequency band, and a second switched terminal coupled to the fourth antenna through an eighth bandpass filter for the second frequency band, the transceiver path further comprising:
a sixth switch coupled between the first switch, the second switch, and the first bandpass filter, the sixth switch comprising a first switched terminal coupled to the first switched terminal of the first switch, a second switched terminal coupled to the first switched terminal of the second switch, and a common terminal coupled to the first bandpass filter; and
a seventh switch coupled between the first switch, the second switch, and the second bandpass filter, the seventh switch comprising, a first switched terminal coupled to the second switched terminal of the first switch, a second switched terminal coupled to the second switched terminal of the second switch, and a common terminal coupled to the second bandpass filter.