A New Aperture for Switched-Beam Low-Profile Ku-Band Mobile Terminal Array Antennas
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.
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Keywords: Antenna arrays ; phased arrays ; planar arrays ; microstrip antennas ; patch antennas ; beam steering ; switched-beam antennas ; mobile terminal antennas ; satellite communications ; Ku band
Record created on 2013-02-27, modified on 2016-08-09