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. 07, 1998
Filed:
Mar. 19, 1996
Antoine Roederer, Noordwijk, NL;
Simon John Stirland, Hitchin, GB;
Agence Spatiale Europeenne, Paris, FR;
Abstract
The invention relates to a feed device for a multisource semiactive antenna with multiple beams, including: a) a nonorthogonal beam shaper device (65) splitting Nb beam input signals and combining them to form Na output signals, b) Na amplifier modules (64), c) an orthogonal output power splitter (63) arranged between the Na amplifier modules (64) and Ne radiating elements (61). According to the invention, Nb.ltoreq.Na.ltoreq.Ne, and the orthogonal transfer function of the splitter (63) permits change between, on the one hand, Nb distributions at the input of the splitter (63), in which the amplitude of the Na signals is equal for each of the Nb beams, and in which the phase satisfied the condition of equality of the scalar products, taken in pairs, of the Nb excitation vectors at the input of the splitter (63), and of the scalar products, taken in pairs, of the Nb corresponding output excitation vectors and, on the other hand, Nb predetermined output distributions. Appended FIG. 6.