H - Electricity – 01 – Q
Patent
H - Electricity
01
Q
351/58
H01Q 3/22 (2006.01) H01Q 19/00 (2006.01) H01Q 21/06 (2006.01) H01Q 25/00 (2006.01)
Patent
CA 1328504
MICROSTRIP ANTENNA SYSTEM WITH MULTIPLE FREQUENCY ELEMENTS ABSTRACT OF THE DISCLOSURE 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 tuned 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.
610941
Pederson Clinton W.
Shapiro Sanford S.
Hughes Aircraft Company
Sim & Mcburney
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