Patent ID: 9128177
Filing Date: 2015-09-08
Classification: G01S,H01Q,H03H,H04B

Abstract:
1. An apparatus, comprising: a tunable duplexer selectively connected to an antenna, configured to transmit and receive radio frequency communication signals in a group of at least two bands; a tunable transmit filter in the duplexer, capable of being tuned to have an inductance value approximately matching at least two inductance values corresponding respectively to pass the at least two bands in the group, each of the at least two bands in the group having a positive duplex offset and each of the at least two inductance values that correspond respectively to the at least two bands in the group, having an inductance value that approximately matches the inductance values corresponding respectively to the other bands in the group; and a second tunable duplexer selectively connected to the antenna, configured to transmit and receive radio frequency communication signals in a second group of at least two bands, the second duplexer comprising a tunable transmit filter capable of being tuned to have an inductance value approximately matching at least two inductance values corresponding respectively to pass the at least two bands in the second group, each of the at least two bands in the second group having a positive duplex offset and each of the at least two inductance values that correspond respectively to the at least two bands in the second group, having a higher inductance value than the inductance value in the first said group, which approximately matches the inductance values corresponding respectively to the other bands in the second group.