High frequency switch
AssigneeSoshin Electric Co., Ltd.
InventorAkira Ando
Life of this patent
Estimating the term…
Abstract
Provided is a high frequency switch wherein first switch circuits, each of which includes a first PIN diode, are connected in parallel to one or more first λ/4 signal transmitting paths which transmit transmitting signals, and second switch circuits, each of which includes a second PIN diode, are connected in parallel to one or more second λ/4 signal transmitting paths which transmit receiving signals to a receiving terminal. A first control voltage is applied to the cathode of the first PIN diode, and a second control voltage is applied to the cathode of the second PIN diode. Furthermore, a biasing circuit which applies a constant bias voltage is connected to each anode of the first PIN diode and the second PIN diode.
Claims9
A high frequency switch including a first switch circuit connected parallel to at least one first signal transmission line for transmitting a transmission signal from a transmission terminal, the first switch circuit having at least one first PIN diode, and a second switch circuit connected parallel to at least one second signal transmission line for transmitting a reception signal to a reception terminal, the second switch circuit having at least one second PIN diode, wherein
- in the first switch circuit, a first transmission line is connected in series to a circuit including the at least one first PIN diode while an anode of the first PIN diode is connected to the first transmission line,
- in the second switch circuit, a second transmission line is connected in series to a circuit including the at least one second PIN diode while an anode of the second PIN diode is connected to the second transmission line,
- cathodes of the PIN diodes are grounded at high frequencies,
- ends of resonant elements or resonant lines are connected to the cathodes of the PIN diodes, and other ends thereof are free ends,
- a first control terminal is electrically connected to one of the anode and the cathode of the first PIN diode, a first control voltage being supplied to the first control terminal,
- a second control terminal is electrically connected to one of the anode and the cathode of the second PIN diode, a second control voltage being supplied to the second control terminal, and
- a bias applying circuit is provided for applying a constant bias voltage to other of the cathodes and the anodes of the PIN diodes.
Dependencies are inferred from the claim text.