Electrically small supergain endfire array antenna
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorsArthur D. Yaghjian, Teresa H. O'Donnell, Edward E. Altshuler, Steven R. Best
Life of this patent
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Abstract
An electrically small supergain endfire transmitting and receiving array antenna comprising at least one first resonant element with a first input terminal. The first resonant element driven by a power supply voltage supplied at the first input terminal. The electrically small supergain endfire transmitting and receiving array antenna further includes at least one second resonant parasitic element with a second input terminal. The second input terminal shorted and the second resonant element spaced less than about 0.25λ from the first resonant element at any corresponding point. The antenna has a gain of at least 6 db and ka<1.0.
Claims1
An electrically small supergain endfire transmitting and receiving array antenna comprising:
- at least one first resonant element having a first input terminal and multiple folds and posts, wherein the folds and posts return to ground, the first resonant element driven by a power supply voltage supplied at the first input terminal;
- and
- at least one second resonant parasitic element with a second input terminal, the second input terminal shorted, the second resonant element spaced less than about 0.15 times a free-space wavelength (λ) from the first resonant element at any corresponding point, wherein the antenna has a gain of at least 6 dB with a radian length k equal to 2π/λ and a radius a of a sphere that circumscribes the antenna, a radiation resistance of about 50 Ohms and ka less than 1.0.
Dependencies are inferred from the claim text.