Patent ID: 6998934
Filing Date: 2006-02-14
Classification: H01P

Abstract:
1. A high frequency switch comprising: a main line electrode provided on a substrate so as to extend between two terminals; a short stub line electrode provided on the substrate and having one end connected to a one-side edge of the main line electrode, and another end that is grounded; an open stub line electrode provided on the substrate having one end connected to an other-side edge of the main line which is in opposed to the one-side edge, and another end that is opened; ground electrodes provided on the substrate adjacent to the short stub line electrode and the open stub line electrode in a width direction thereof; a semiconductor activation layer provided in the portion of the substrate between a side edge at least on the one-end side of the open stub line electrode and the ground electrode so as to be extended under the open stub line electrode and under the ground electrode; and a gate electrode provided on the semiconductor activation layer between the open stub line electrode and the ground electrode so as to extend along a longitudinal direction of the open stub line electrode, whereby an FET structure is provided.