Switched-resonance antenna phase shifter and phased array incorporation same
First Claim
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1. An RF antenna phase shifter comprising:
- an RF antenna element having plural controllable possible resonant modes of operation, said modes exhibiting phase shifted antenna characteristics relative to one another; and
a controllable circuit connected to selectively cause different ones of said possible resonant modes of operation to occur.
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Abstract
Controlled phase shift in the operation of an RF antenna element is achieved by selectively choosing between different modes of antenna element resonance. Additional phase control resolution is achieved by combining this with other types of phase shifters. Such phase shifters are especially useful within a phased array of RF antenna radiator elements.
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Citations
22 Claims
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1. An RF antenna phase shifter comprising:
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an RF antenna element having plural controllable possible resonant modes of operation, said modes exhibiting phase shifted antenna characteristics relative to one another; and
a controllable circuit connected to selectively cause different ones of said possible resonant modes of operation to occur. - View Dependent Claims (2, 3)
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4. A method for providing controlled phase shifts in the operation of an RF antenna element, said method comprising:
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providing an RF antenna element having plural controllable possible resonant modes of operation, said modes exhibiting phase shifted antenna characteristics relative to one another; and
selectively causing different ones of said possible resonant modes of operation to occur. - View Dependent Claims (5, 6)
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7. An antenna phase shifter comprising:
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an RF antenna element having two resonant modes of operation respectively corresponding to two separated feed ports, each said resonant mode being shifted by 180 degrees with respect to the other; and
a controllable RF switch connected to switch an RF feed line between said feed ports in dependence upon an electrical control signal thereby achieving a 0°
/180°
relative phase shift in antenna element operation. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A method for providing controlled phase shifts in the operational mode of an antenna element, said method comprising:
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providing an RF antenna element having two resonant modes of operation respectively corresponding to two separated feed ports, each said resonant mode being shifted by 180 degrees with respect to the other; and
controllably switching an RF feed line between said feed ports in dependence upon an electrical control signal thereby achieving a 0°
/180°
relative phase shift in antenna element operation. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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Specification