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J. Puskely, T. Mikulasek, J. Lacik, R. Zbynek, H. Arthaber:
"SIW-Fed Vivaldi Antenna with Beam Steering Capabilities";
Microwave and Optical Technology Letters, Vol. 59 (2017), No. 5; S. 1022 - 1027.

A tapered slot antenna element capable of reconfiguring its beam direction is presented. As the basic element, a Vivaldi antenna fed by a substrate integrated waveguide is chosen. The Vivaldi antenna
is complemented by a parasitic planar array of small metallic patches
placed in front of its aperture and by corrugated edges of the Vivaldi
antenna´s arms to provide reconfiguration capabilities. The proposed antenna´s beam can be steered in five directions by configuring the
interconnections of the parasitic patches and by activation/deactivation of the corrugated edges in the antenna arms. The antenna steers the radiation beam over +/- 30° in E plane and operates in the frequency band of 6.0-6.5 GHz. The measured gain at 6.25 GHz for 0°, +/-15° and +/-30° beam direction of the antenna with ideal switches, is 8.4 dBi, 7.5 dBi, and 6.7 dBi, respectively.

beam steering; reconfigurable antenna; substrate integrated waveguide; Vivaldi antenna

http://dx.doi.org/10.1002/mop.30447