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. 12, 1990
Filed:
Sep. 29, 1988
Sanford S Shapiro, Canoga Park, CA (US);
Clinton W Pederson, South El Monte, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
An antenna system includes an array of microstrip antenna elements wherein each of the elements includes two or more radiators. Electromagnetic signals are coupled from an input terminal of each element via one or more circulators which allow for application of an input signal to a first of the radiators followed by rerouting of respective signals to the next radiator. The radiators are turned to radiate at successively higher portions of the electromagnetic spectrum. By virtue of reflections of higher frequency radiation from a radiator tuned to a lower portion of the signal spectrum, each radiator radiates only that portion of the signal spectrum falling within the bandwidth of the radiator. By using three radiators, each antenna element is capable of radiating a signal spectrum three times as wide as are the bandwidths of a single radiator. Included within the antenna system is one or more power dividers to form one or more beams of radiation. With the use of plural power dividers, switching circuitry may be employed to select sequentially individual ones of the power dividers so as to scan a beam of radiation.