Patent ID: 9450639
Filing Date: 2016-09-20
CPC Classification: H04B

Claim Text:
1. A radio frequency (RF) transmit-receive switch with an antenna port, first and second transmit differential ports and first and second receive differential ports, the switch comprising: a first transmit transistor switch connected to the first transmit differential port; a second transmit transistor switch connected to the second transmit differential port; a transmit coupled inductor transformer including a pair of primary terminals connected across the first transmit transistor switch and a pair of secondary terminals connected across the second transmit transistor switch; a first receive transistor switch connected to the first receive differential port; a second receive transistor switch connected to the second receive differential port; a receive coupled inductor transformer including a pair of primary terminals connected across the first receive transistor switch and a pair of secondary terminals connected across the second receive transistor switch; and a balun having a first balun inductive winding and a second balun inductive winding, the first balun inductive winding being connected to the antenna port, and the second balun inductive winding defined by a first end connected to the first transmit transistor switch and the first receive transistor switch, and a second end connected to the second transmit transistor switch and the second receive transistor switch.