Abstract: A radio frequency front end circuit includes an output signal transmission line, an amplifier circuit with an input connected to a radio frequency signal source and an output connected to the output signal transmission line. A harmonic suppression circuit is connected to the amplifier circuit, and includes an active circuit element having a frequency-dependent impedance and is tuned as a reflective trap with a negative capacitance for one or more rejection frequency ranges each corresponding to a multiple of a fundamental frequency of a signal generated by the radio frequency signal source.

Abstract: Methods for antenna switch modules are disclosed. In certain implementations, a method of making an antenna switch module is provided. The method includes providing a package substrate implemented to receive one or more electrical components, attaching a silicon on insulator (SOI) die to the package substrate, and providing an integrated filter. The SOI die includes a capacitor and a switch coupled to a plurality of radio frequency (RF) signal paths. The integrated filter filters an RF signal received on a first RF signal path of the plurality of RF signal paths, and includes the capacitor of the SOI die and an inductor.