Microstrip antenna system with multiple frequency elements
First Claim
1. An antenna system comprising:
- an array of microstrip antenna elements, each of said elements comprising a first radiator, a second radiator, and a circulator;
power dividing means connected to an input terminal of each of said antenna elements; and
whereinin each of said elements, said circulator has a plurality of ports, a first of said ports connecting at said input terminal with said power dividing means, a second of said ports connecting with said first radiator, and a third of said ports connecting with said second radiator;
in each of said elements, said second radiator is operative to radiate in a second frequency band higher than a first radiation frequency band of said first radiator, said first radiator reflecting radiation of said second frequency band via said circulator to said second radiator;
said power dividing means transmits radiation occupying the frequency bands of both radiators via said circulator in each of said antenna elements towards the input terminal in each of said elements; and
corresponding ones of the radiators of said antenna elements are spaced apart with predetermined spacings for generation of a beam of radiation by the antenna system.
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Accused Products
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.
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Citations
11 Claims
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1. An antenna system comprising:
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an array of microstrip antenna elements, each of said elements comprising a first radiator, a second radiator, and a circulator; power dividing means connected to an input terminal of each of said antenna elements; and
whereinin each of said elements, said circulator has a plurality of ports, a first of said ports connecting at said input terminal with said power dividing means, a second of said ports connecting with said first radiator, and a third of said ports connecting with said second radiator; in each of said elements, said second radiator is operative to radiate in a second frequency band higher than a first radiation frequency band of said first radiator, said first radiator reflecting radiation of said second frequency band via said circulator to said second radiator; said power dividing means transmits radiation occupying the frequency bands of both radiators via said circulator in each of said antenna elements towards the input terminal in each of said elements; and corresponding ones of the radiators of said antenna elements are spaced apart with predetermined spacings for generation of a beam of radiation by the antenna system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification