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A New Aperture for Switched-Beam Low-Profile Ku-Band Mobile Terminal Array Antennas [EurAAP Corner]

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4 Author(s)
Bongard, F. ; Antenna Syst., JAST SA, Lausanne, Switzerland ; del Rio, D.L. ; Vigano, M.C. ; Vaccaro, S.

This paper presents an innovative switched-beam architecture for a low-cost mobile-terminal antenna, suitable for linear-polarized satellite communications systems. This antenna concept can produce twelve adjacent sector beams that cover the full azimuth field of view with a directivity of 11 dB, using the same physical aperture. This radiating aperture consists of slot-coupled patch antennas arranged in a specific lattice, inspired by the so-called tri-hexagonal tiling of the plane. An innovative beamforming-network layout, based on series feeding, is devised to reduce the circuit-board real estate required by the different beams. A prototype producing two beams has been built, and its radiation pattern has been measured, in order to demonstrate the feasibility of the approach.

Published in:

Antennas and Propagation Magazine, IEEE  (Volume:54 ,  Issue: 3 )

Date of Publication:

June 2012

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