High power UHF single-pole multi-throw switch

Details High power UHF single-pole multi-throw switch High power UHF single-pole multi-throw switch

2009-05-18

2011-11-01

Takaoka, Dean (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S104000

Reexamination Certificate

active

08049574

ABSTRACT:
A single pole multiple-throw switch for switching an RF signal to one of a plurality of outputs includes coupling the signal to a throw junction, said junction having connected thereto a plurality of switch legs, each leg includes a high voltage shunt diode spaced one quarter-wavelength from the throw junction; each diode mounted at its cathode end to a capacitor and adapted to receive a bias; wherein a controller applies a first DC bias to a selected one of the diodes to cause the selected diode to operate in reverse bias mode, such that the selected diode mounted on the corresponding capacitor provides a low insertion loss to pass the RF signal from the transmission line through the selected leg and to one of the outputs; and applies a second DC bias to the other diodes to cause the other diodes to operate in forward bias mode such that the other diodes mounted onto the corresponding capacitor provides a high insertion loss for blocking the RF signal to the remaining outputs.

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