Patent ID: 7838914

Claim:
A radio frequency module for use in a mobile communication device, including: a power amplifier circuit for transmission of a radio frequency signal; and an antenna switch circuit coupled to the power amplifier circuit, which is used for switching transmission and reception of radio frequency signals, wherein the antenna switch circuit is comprised of a high electron mobility transistor(HEMT), wherein the HEMT includes: a channel layer formed in an active region surrounded by an element separation region on a main surface of a substrate; an electron supplying layer formed on the channel layer; a gate electrode Schottky-connected to the electron supplying layer; a first source electrode and a first drain electrode ohmic-connected to the electron supplying layer and a second source electrode and a second drain electrode ohmic-connected to the electron supplying layer, wherein the gate electrode continuously extends along a path that extends between the first source electrode and the first drain electrode along a first direction, extends toward the second source electrode along a second direction perpendicular to the first direction and extends between the second source electrode and the second drain electrode along the first direction.