Multifrequency array using common phasors
First Claim
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1. A phased array antenna system comprising:
- first means including a plurality of frequency generators for simultaneously outputting a plurality of frequency signals, each said frequency signal being an approximate multiple of the one of said plurality of frequency signals having the lowest frequency;
a plurality of phase shifters connected to the output of said first means, each of said phase shifters being operably coupled to each of said frequency generators and each of said phase shifters introducing a different phase increment in response to each of said plurality of frequency signals;
a plurality of radiating elements each being operably coupled to one of said plurality of phase shifters;
whereby in response to each of said frequency signals, said plurality of radiating elements simultaneously generates a plurality of beams, each said beam having a different beam pointing angle.
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Abstract
A single antenna array having a phase shifter at the input of each antennalement and fed by a multifrequency input for simultaneously generating at least two beams. When the different excitation frequencies are simultaneously inputted into the phase shifters, a separate phase increment is introduced into each radiator for each frequency. The result is a separate beam output from each frequency input, the beams being generated simultaneously but at different beam pointing angles.
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Citations
10 Claims
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1. A phased array antenna system comprising:
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first means including a plurality of frequency generators for simultaneously outputting a plurality of frequency signals, each said frequency signal being an approximate multiple of the one of said plurality of frequency signals having the lowest frequency; a plurality of phase shifters connected to the output of said first means, each of said phase shifters being operably coupled to each of said frequency generators and each of said phase shifters introducing a different phase increment in response to each of said plurality of frequency signals; a plurality of radiating elements each being operably coupled to one of said plurality of phase shifters; whereby in response to each of said frequency signals, said plurality of radiating elements simultaneously generates a plurality of beams, each said beam having a different beam pointing angle. - View Dependent Claims (2, 3, 4, 5, 6, 10)
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7. A method of simultaneously generating at least two beams utilizing a single antenna array comprised of a plurality of radiating elements and a single phase shifter at the input to each said element comprising the steps of:
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(1) simultaneously generating at least two frequency signals which are approximate multiples of the lowest frequency signal of said at least two frequency signals; (2) simultaneously applying said at least two frequency signals to each said phase shifter at the input to each said element whereby each said phase shifter introduces a different phase shift in response to each said frequency signal and; (3) applying the outputs of each of said phase shifters to its respective radiating element whereby said plurality of radiating elements form a separate beam for each said at least two frequency signals, each said beam having a different beam pointing angle. - View Dependent Claims (8, 9)
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Specification