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Title: On the Design of Pattern Reconfigurable Alford Loop Antennas
We present a step-by-step approach for designing a recofigurable Alford loop antenna (RALA). The design of an 3.5 GHz RALA is shown. The antenna is fabricated using a 1.6 mm thick double-sided FR4 substrate. We sweep antenna geometrical parameters and show the effect on antenna input impedance, reflection coefficient (S 11 ), and radiation patterns. The final antenna structure resonates at 3.5 GHz with eight directional and one omnidirectional radiation patterns. We also present a simplistic control circuit responsible for activating the antenna elements. Tri-state impedance matching- a major challenge in the design of RALA is also discussed and analyzed along with a proposed method for mitigation. 3D radiation patterns of the RALA was measured using an EMScan and a maximum gain of 4.5 dBi is found.  more » « less
Award ID(s):
1730140 1816387
PAR ID:
10355676
Author(s) / Creator(s):
;
Date Published:
Journal Name:
2021 International Conference on Electromagnetics in Advanced Applications (ICEAA)
Page Range / eLocation ID:
197 to 202
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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