High band TDD antenna swapping method with improved receiver sensitivity
摘要:
This disclosure relates to radio frequency (RF) front end circuitry for portable communication devices. In one embodiment, the RF front end circuitry includes an antenna, a switchable receive path configured to be opened and to be closed, a coaxial cable, and a low noise amplifier (LNA). The LNA is coupled so as to drive the coaxial cable. Thus, when the switchable receive path is closed, an RF receive signal received by the antenna can propagate through the switchable receive path to the LNA. Since the LNA is driving the coaxial cable, the RF receive signal can propagate through the coaxial cable without being excessively degraded. In this manner, embodiments of the RF front end circuitry can be utilized to provide antenna swapping and RF transceiver circuitry coupled to the coaxial cable can receive the RF receive signal from the coaxial cable without excessive degradation.
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