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:
Oct. 23, 1990
Filed:
Oct. 17, 1989
Peter J Kahrilas, Placentia, CA (US);
Thomas W Miller, Yorba Linda, CA (US);
Samuel P Lazzara, Genese, BE;
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
A phased array antenna system is disclosed which employs digital beamforming of multiple independent transmit beams. A waveform generator provides successive digitized time samples of a desired waveform, and the respective beamforming coefficients which produce the desired amplitude and phase distribution for each beam are applied to the waveform samples. The resulting digital samples are then mixed up to IF, converted to digital form, frequency converted to the desired RF frequency, amplified and passed to the respective antenna subarrays. The transmit system permits fine granularity phase control, providing accurate beamforming and positioning and improved sidelobe control.