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$2\times2$ Phased Array Consisting of Square Loop Antennas for High Gain Wide Angle Scanning With Low Grating Lobes / Arpan Pal; Amit Mehta; Dariush Mirshekar-Syahkal; Hisamatsu Nakano
IEEE Transactions on Antennas and Propagation, Volume: 65, Issue: 2, Pages: 576 - 583
Swansea University Author: Mehta, Amit
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A 2 × 2 array antenna comprised of conventional hybrid high impedance surface-based reconfigurable square loop antennas (SLAs) as elements is presented. The SLA element has four conducting arms and each arm is fed at the middle by vertical probes, which is connected to a 50 Ω port at the bottom of a...
|Published in:||IEEE Transactions on Antennas and Propagation|
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A 2 × 2 array antenna comprised of conventional hybrid high impedance surface-based reconfigurable square loop antennas (SLAs) as elements is presented. The SLA element has four conducting arms and each arm is fed at the middle by vertical probes, which is connected to a 50 Ω port at the bottom of antenna ground plane. Thus, the SLA element has four feeding ports and it is capable of generating five distinct radiation patterns by using a combination of its feeding ports. Depending upon which of its four ports are excited it can provide four high gain off-boresight tilted beams (8.9 dBi at θmax = 36°) in four different quadrants of the space (tilted beam mode). When all the four ports are simultaneously excited with phases of 0°, 0°, 180°, and 180°, it provides an axial beam (6.5 dBi) at boresight (axial beam mode). By combining these two modes the 2 × 2 array of SLAs can provide a scanning range of -60° to +60° in the elevation plane with high-gain beams (14-11.2 dBi).
The PI made a substantial contribution to the conception and design, led the work and helped to draft / to redraft the output for important intellectual content.
phased array antennas, beam steering, beam switched antennas
College of Engineering