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:
Jun. 18, 1985
Filed:
Oct. 15, 1982
Earnest A Franke, Goode, VA (US);
General Electric Company, Lynchburg, VA (US);
Abstract
A wide range reflective phase shifter/modulator including a 3dB hybrid splitter having ports A, B, C and D. An input signal to be phase modulated is applied to port-A and the phase modulator output signal is derived from port-C. Ports B and D are terminated with reactive circuits, which must be identical, including four variable reactive elements such as varactor diodes, the capacitance of which can be controlled by a modulating control voltage. By controlling the capacitance of the varactor diodes, the amount of phase shift in the signal derived from port-C is controlled. An alternative embodiment includes a circulator having ports E, F and G. An input signal to be phase modulated is applied to port-E and the phase modulator output signal is derived from port-G. Port-F is terminated with a reactive circuit, which includes two variable reactive elements such as varactor diodes, the capacitance of which can be controlled by a modulating control voltage. By controlling the capacitance of the varactor diodes, the amount of phase shift in the signal derived from port-G is controlled.