US 12,489,474 B2
RF transceiver
Konstantinos Manetakis, Neuchâtel (CH); and Anjana Dissanayake, Neuchâtel (CH)
Assigned to CSEM Centre Suisse d'Electronique et de Microtechnique SA—Recherche et Développement, Neuchâtel (CH)
Filed by CSEM Centre Suisse d'Electronique et de Microtechnique SA—Recherche et Développement, Neuchâtel (CH)
Filed on Jul. 3, 2023, as Appl. No. 18/346,665.
Claims priority of application No. 22183057 (EP), filed on Jul. 5, 2022; and application No. 22186485 (EP), filed on Jul. 22, 2022.
Prior Publication US 2024/0014835 A1, Jan. 11, 2024
Int. Cl. H04B 1/40 (2015.01); H04B 1/00 (2006.01); H04B 1/04 (2006.01); H04B 1/44 (2006.01)
CPC H04B 1/04 (2013.01) [H04B 1/0078 (2013.01); H04B 2001/0408 (2013.01); H04B 1/44 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A RF transceiver comprising:
a single RF antenna port for a receive path, a first transmit path and a second transmit path
a balun comprising a primary winding and a secondary winding, wherein a first terminal of the secondary winding is coupled to the RF antenna port,
the receive path, which comprises
a low noise amplifier, comprising an input terminal coupled to a second terminal of the secondary winding,
the first transmit path, which comprises
a high power amplifier, comprising differential output terminals coupled to the primary winding, and
a first and second switches between each differential output terminal of the high power amplifier and a ground potential,
a third capacitor between the first switch and the ground potential or between the first switch and a first differential output terminal of the high power amplifier,
a fourth capacitor between the second switch and the ground potential or between the second switch and a second differential output terminal of the high power amplifier,
the second transmit path, which comprises
a low power amplifier having an output terminal coupled to the RF antenna port, and
a third switch between the output terminal of the low power amplifier and the ground potential,
wherein the RF transceiver is configured to be in
a high power transmit mode when the first, second and third switches are in a closed position, wherein in the high power transmit mode the first transmit path is arranged to provide to the RF antenna port a high power RF signal,
a low power transmit mode when the first, second and third switches are in an open position, wherein in the low power transmit mode the second transmit path is arranged to provide to the RF antenna port a low power RF signal,
a receive mode when the first, second and third switches are in an open position, wherein in the receive mode the receive path is arranged to receive from the RF antenna port a third RF signal.