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A steerable leaky-wave antenna using a tunable impedance ground plane

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4 Author(s)
Sievenpiper, Dan ; HRL Labs. LLC, Malibu, CA, USA ; Schaffner, J. ; Lee, J.J. ; Livingston, S.

A steerable leaky-wave antenna is built using a mechanically tunable impedance surface. A horizontally polarized antenna couples energy into leaky transverse electric waves on a tunable textured ground plane. By tuning the resonance frequency of the surface, the band structure is shifted in frequency, which changes the tangential wave vector of the leaky waves for a fixed frequency. This steers the elevation angle of the resulting radiated beam. This steerable leaky-wave antenna can scan over a range of 45/spl deg/ using a mechanical movement of about 1/500 wavelength.

Published in:

Antennas and Wireless Propagation Letters, IEEE  (Volume:1 ,  Issue: 1 )