High-frequency switch

摘要

To provide a high frequency switch capable of dealing with multiple frequency bands without having plurality of switch circuits. A first diode that conducts due to a bias current when a first switch is closed is interposed between first signal terminal and a second signal terminal. A strip line with the electrical length L₁ is connected to the cathode of the first diode, the other end being grounded. At a position with a distance L₂ from one end of the strip line, a capacitor and a second switch are connected to be equivalently grounded when the second switch is closed. The strip line resonates with the electrical length L₁ when the second switch is opened, and resonates with the electrical length L₂ when the second switch is closed.