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360° scanning multi-beam antenna based on homogeneous ellipsoidal lens fed by circular array

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3 Author(s)
Zhang, J. ; Ministerial Key Lab. of JGMT, Nanjing Univ. of Sci. & Technol., Nanjing, China ; Wu, W. ; Fang, D.-G.

Presented is a multi-beam antenna which can realise 360° switching scanning in azimuth. The antenna system is composed of a homogeneous ellipsoidal lens and a planar circular tapered slot antenna (TSA) array. Each TSA element is fed with a rectangular waveguide by a special waveguide-to-TSA transition. Beam scanning can be achieved by switching between the waveguide feeders. A Ku-band Teflon ellipsoidal lens fed with 20 Fermi-TSAs has been fabricated. Measurements show that the sidelobe levels of the 20 beams are all below-17 dB and the gain differences are all within +0.4 dB.

Published in:

Electronics Letters  (Volume:47 ,  Issue: 5 )

Date of Publication:

March 3 2011

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