Re: rf transceiver.....
Hi,
If your transceiver chip has a direct antenna connection pin ( doesn't have separated rf in and rf out) you can insert a PA between 2 switches. When you are transmitting, the signal goes through switch1 ->PA-> switch2 to the antenna, when you are receiving the antenna is connected through the switch2-> switch1 to the transceiver.
You have to solve the command signal to switch the direction.
The "antenna boosters" works in a similar way, and they are using a detector on the transcever side. The RF output signal of the transceiver has enough power level to be detected, and drive a comparator, which is used to drive the switches. When the transceiver is not transmitting, the switches are drived on the receiver path.
hope this help.
rgds,
Al