CPC H04B 1/1036 (2013.01) [H03F 3/245 (2013.01); H03H 7/0115 (2013.01); H04M 1/0202 (2013.01); H03F 2200/171 (2013.01); H04B 2001/1063 (2013.01); H04B 2001/1072 (2013.01)] | 20 Claims |
1. A radio frequency system with tunable notch filtering, the radio frequency system comprising:
a power amplifier having an output;
a radio frequency switch;
a first tunable filter coupled between the output of the power amplifier and the radio frequency switch;
an antenna switch coupled to the radio frequency switch by way of at least one radio frequency signal path; and
a second tunable filter coupled between the antenna switch and an antenna node, the second tunable filter including a first inductor, a second inductor mutually coupled to the first inductor, and a tunable impedance circuit coupled to the first inductor and including a switch, the first inductor associated with a tunable first notch, the second inductor associated with a second tunable notch, and the tunable impedance circuit configured to adjust a state of the switch such that locations of the first tunable notch and the second tunable notch are adjusted.
|