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:
Apr. 15, 2003
Filed:
Aug. 28, 2000
Robert J. Mailloux, Wayland, MA (US);
The United States of America as represented by the Secretary of the Air Force, Washington, DC (US);
Abstract
A constrained feed can enable a phased array to be fed from a number of subarray ports while maintaining good sidelobe control. The invention pertains to using constrained feed networks, like Rotman lenses, Butler matrices and waveguide networks instead of a single space feed, to produce these subarrays. The formed subarrays are partially overlapped, and this is required to develop good sidelobe control. The invention solves the problem of having high sidelobes when an array is fed by contiguous, uniformly illuminated subarrays and so allows optical time delay, digital time delay and limited field of view scanning with a constrained network while maintaining low sidelobe radiation.