Single input/output port radio frequency transceiver front end circuit
AssigneeRfaxis, Inc.
InventorOleksandr Gorbachov
Life of this patent
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Abstract
A front end circuit for coupling an antenna to a radio frequency (RF) transceiver for time domain duplex systems is disclosed. The front end circuit includes an antenna port, a power amplifier, a low noise amplifier, and a matching network. The output of the power amplifier and the input of the low noise amplifier are coupled to the matching network and connected in common to the antenna. The power amplifier and the low noise amplifier are activated and deactivated in sequence corresponding to the transmit and receive modes of the transceiver, and the matching network minimizes the effect that one has on the other at the designated operating frequency.
Claims11
A radio frequency (RF) transceiver front end circuit with a predefined operating frequency for connecting a transceiver to an antenna, the front end circuit comprising:
- an antenna port connectible to the antenna;
- a common transmit and receive port;
- a power amplifier including a first power amplifier transistor having a base, a collector, and an emitter;
- a power amplifier input matching network coupling the common transmit and receive port to the power amplifier;
- a low noise amplifier including a first low noise amplifier transistor having a base, a collector, and an emitter;
- a low noise amplifier output matching network coupling the common transmit and receive port and the low noise amplifier;
- and
- a matching circuit including a power amplifier output matching segment coupled to the collector of the first power amplifier transistor and the antenna port, and a low noise amplifier input matching segment coupled to the base of the first low noise amplifier transistor and the antenna port, the power amplifier matching segment having shared components with the low noise amplifier segment.
Dependencies are inferred from the claim text.