The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 03, 1987
Filed:
Sep. 14, 1984
Lakshminarasimha C Upadhyayula, East Windsor Township, Mercer County, NJ (US);
RCA Corporation, Princeton, NJ (US);
Abstract
A continuously variable phase shifter for the phase range from 0.degree. to 90.degree., switchable phase shifters switchable between 0.degree. and 90.degree. and a continuously variable phase shifter for the phase shift range of 0.degree. to 360.degree. are disclosed. Each of the phase shifters relies on dual gate FET devices to provide the required phase shift in a compact structure while providing sufficient gain to avoid signal losses through the phase shifter. The transmission phase shift through a dual gate FET device is controlled by the DC bias on its second gate and by the type of reactive termination on that gate. A capacitive termination provides a transmission phase shift which is substantially independent of bias while an inductive termination provides a transmission phase shift which varies substantially linearly with bias voltage over a substantial range of bias voltage.