Skyworks Solutions, Inc.

Cejun Wei

Yu Zhu

Jerod F Mason

Fikret Altunkilic

Haki Cebi

pHEMT-based switch circuits, devices including same, and methods of improving the linearity thereof. In one example, an antenna switch module includes a pHEMT switching circuit connected in series between an input signal terminal and a load terminal, the pHEMT switching circuit including at least one pHEMT configured to produce a first harmonic signal at the load terminal responsive to being driven by an input signal of a fundamental frequency received at the input signal terminal, the first harmonic signal having a first phase, and a gate resistance circuit connected to a gate of the at least one pHEMT and having a resistance value selected to produce a second harmonic signal at the load terminal, the second harmonic signal having a second phase opposite to the first phase.

pHEMT switch circuits with enhanced linearity performance

pHEMT-based circuits and methods of improving the linearity thereof. One example pHEMT circuit includes a pHEMT connected between an input terminal and a load and a non-linear resistance connected to the pHEMT. The pHEMT produces a first harmonic signal at the load responsive to being driven by an input signal of a fundamental frequency received at the input terminal, the first harmonic signal having a first phase. The non-linear resistance has a resistance selected to produce a second harmonic signal at the load having a second phase opposite to the first phase. Methods can include determining a first amplitude and a first phase of a first harmonic signal produced at the load by a pHEMT in an ON state, and tuning the non-linear resistance to produce at the load a second harmonic signal having a second amplitude and a second phase that minimizes a net harmonic signal at the load.

PHEMT components with enhanced linearity performance

A switch element includes a source having a plurality of source fingers and a drain having a plurality of drain fingers interleaved with the source fingers. An active mesa region is defined between at least one of the plurality of source fingers and an adjacent at least one of the plurality of drain fingers. A plurality of gates are disposed between the at least one of the plurality of source fingers and the adjacent at least one of the plurality of drain fingers. At least one of gates extends into the active mesa region from outside of the active mesa region and terminates within the active mesa region.

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Burlington, MA, United States of America

Cejun Wei