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:
Jan. 09, 2001
Filed:
Feb. 15, 2000
Jerome Johnson Tiemann, Schenectady, NY (US);
Richard Louis Frey, Delanson, NY (US);
William Taylor Lotshaw, Niskayuna, NY (US);
Lockheed Martin Corp., Marietta, GA (US);
Abstract
A reflective modulator (,) includes a light splitter (,) which divides light into two portions, one of which is applied to a directional coupler (,) by a first path (,), and the other of which is applied to the directional coupler (,) by way of cascaded electrooptic (e-o) modulators (,). One port of the directional coupler (,) is terminated in a reflector (,), and the other in an absorptive termination (,). Electrical signals A and B are applied to the modulators (,), with the result of generation of sum and difference frequencies modulating the light. The light leaves the reflective modulator (,) and is coupled to a utilization apparatus (,) by a second directional coupler (,). A further e-o modulator (,) may be coupled in the first path, for controlling the long-term average phase shift. In a particularly advantageous embodiment of the invention, the signal sources (,) are elemental antennas of an array (,).