Communications: radio wave antennas – Antennas – Wave guide type
Patent
1997-07-31
1999-10-26
Font, Frank G.
Communications: radio wave antennas
Antennas
Wave guide type
343772, 343767, 343783, H01Q 1300, H01Q 1302
Patent
active
059736534
ABSTRACT:
The inline coaxial balun fed cornu flared horn antenna is formed by transitioning a coaxial transmission line to a parallel-plate transmission line with a Klopfenstein impedance profile and terminating with a flared horn antenna based on a scaled cornu spiral. The cornu spiral is a mathematical plane curve formed by parametrically plotting the scaled cosine Fresnel integral versus the scaled sine Fresnel integral. The antenna has the property that the curvature of the flare increases linearly in proportion to the arc length of the flare. The Klopfenstein impedance profile of the inline balun ensures a low voltage reflection across a wide bandwidth with a minimum transition length and together with the cornu flare satisfies the requirements for a wideband design. The design efficiently radiates and receives a high power pulse of ultrawideband electromagnetic waves over a preferred range of angles in space and transmits a field that is nearly the scaled temporal derivative of the input voltage signal and receives a voltage that is nearly the scaled replica of the incident field.
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Kragalott Mark
Pala William
Font Frank G.
Lauchman Layla
McDonnell Thomas E.
Stockstill Charles J.
The United States of America as represented by the Secretary of
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