Samsung Electro-mechanics Co., Ltd.

Norihisa Otani

Eiichiro Otobe

Tsuyoshi Sugiura

Koki Tanji

There is provided a high frequency switch capable of suppressing deterioration in distortion characteristics. The high frequency switch includes: a common port outputting a transmission signal to an antenna; a plurality of transmission ports each having the transmission signal input thereto; and a plurality of switching units each connected between the plurality of transmission ports and the common port to conduct or block the transmission signal from each of the transmission ports to the common port, wherein each of the switching units has one or more metal oxide semiconductor field effect transistors (MOSFETs) formed on a silicon substrate, and a capacitor connected between a body terminal of a MOSFET connected to the common port among the MOSFETs and a terminal of the MOSFET connected to the common port.

High frequency switch

There is provided a high frequency switching circuit that can reduce generation of a harmonic signal without using a boost circuit. A high frequency switching circuit according to an aspect of the invention may include: a first switch having one end connected to a first port and the other end connected to a ground; a second switch having one end connected to a second port and the other end connected to the first port by a phase rotation element; and a control circuit controlling to turn off the first switch and turn on the second switch when a high frequency signal input to the first port is output through the second port, wherein the control circuit controls the off-state of the first switch so as to increase harmonics of the high frequency signal generated from the first switch, and the phase rotation element rotates the phase of the harmonics generated in the first switch within a frequency band of the harmonics, and cancels the phase-rotated harmonics generated from the first switch and harmonics generated from the second switch in opposite phases to each other.

High frequency switching circuit

Disclosed is a switch circuit capable of reducing distortion caused by harmonics and preventing an increase in insertion loss even if the number of ports increases. The switching circuit includes one common output port, M first switches having one set of ends connected in common to a first node (M&#x2267;2 where M is a constant), N second switches having one set of ends connected in common to the common output port (N&#x2267;1 where N is a constant), a third switch having one end connected to the common output port and the other end connected to the first node, M first input ports respectively connected to the other set of ends of the first switches, and N second input ports respectively connected to the other set of ends of the second switches. One selected among the first input ports and the second input ports is connected to the common output port, and if one of the first input ports is selected, the third switch is closed.

Growing community of inventors

Yokohama, Japan

Norihisa Otani