RF switch with transformer and switching method thereof

摘要

A radio frequency (RF) switch with a transformer and a switching method thereof are provided. The RF switch includes a transmitting end transformer having a primary side connected to a transmitting end and a secondary side connected to an antenna; and a receiving end transformer having a primary side connected to the antenna and a secondary side connected to a receiving end. In a transmission mode, the transmitting end transformer is tuned on, and, in a reception mode, the receiving end transformer is turned on. Accordingly, since switching is performed based on transformers rather than transistors connected in series, the RS switch, which can achieve high linearity and low insertion loss as well as high isolation, can be implemented.

主权项

1. A radio frequency (RF) switch, comprising:
a transmitting end transformer having a primary side connected to a transmitting end and a secondary side connected to an antenna; a receiving end transformer having a primary side connected to the antenna and a secondary side connected to a receiving end; a transmitting end switch connected in parallel to the primary side of the transmitting end transformer, and configured to be turned off in a transmission mode to open the transmitting end; and a receiving end switch connected in parallel to the secondary side of the receiving end transformer, and configured to be turned off in a reception mode to open the receiving end, wherein, in the transmission mode, the transmitting end transformer is tuned on and the receiving end transformer is turned off, and wherein, in the reception mode, the receiving end transformer is turned on and the transmitting end transformer is turned off.