Patent ID: 7808342
Filing Date: 2010-10-05
Classification: H03H

Abstract:
1. A switching module comprising: a first harmonic phase tuning filter coupled to a first input of an RF switch; said first harmonic phase tuning filter including an input section comprising a Pi-type LC filter and an output section, said output section coupled between said input section and said first input of said RF switch; said first harmonic phase tuning filter configured to provide an output impedance that substantially matches an input impedance of said RF switch at approximately a fundamental frequency and to provide a selected impedance at approximately a third harmonic frequency generated by said RF switch; wherein said Pi-type LC filter comprises: wherein said output section comprises an LC circuit coupled between said output terminal of said input section and said first input of said RF switch, said LC circuit being tuned to provide said selected impedance so as to improve harmonic performance of said first RF switch, a value of said selected impedance not including a phase short or a phase open.