Reflective phase shifter

Details Reflective phase shifter Reflective phase shifter

H - Electricity

01

P

333/29

H01P 1/18 (2006.01) H01P 1/185 (2006.01)

Patent

CA 1250029

Abstract of the Disclosure A digitally controlled reflective type phase shifter wherein radio frequency energy is fed to an input/output port of the phase shifter and then coupled from the phase shifter at the input/output port, the phase shifter providing one of a plurality of predetermined phase shifts between the fed energy and the coupled energy selectively in accordance with a control signal. The phase shifter includes: a coaxial transmission line with an inner conductor and an outer conductor, a first end of the inner conductor and a first end of the outer conductor providing the input/output port; a conductor connected to the second end of the outer conductor, such conductor being dielectrically spaced from a second end of the inner conductor; and, a plurality of switches, disposed between different portions of the second end of the inner conductor and the conductor and responsive to a control signal, for electrically connecting a selected one or ones of said different portions of the second end of the inner conductor to the conductor while unselected ones of the different portions of the second end of the inner conductor remain dielectrically spaced from the conductor.

507453

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