Title :
Enhanced design of bowtie antennas over High-Impedance surfaces: An evolutionary approach
Author :
Mahmoud, Ahmed ; Hoorfar, Ahmad ; Thajudeen, C.
Author_Institution :
Dept. of Electr. & Syst. Eng., Univ. of Pennsylvania, Philadelphia, PA, USA
Abstract :
This work presents optimization of printed wideband antennas that are backed by High Impedance surfaces using a hybrid of constrained Evolutionary Programming (EP) and a MoM based simulator, This approach is used to arrive at optimized designs for semi-conformal bowtie antenna structures of about λ/10 thick with enhanced bandwidth performance, which are superior to previously reported structures. Two different designs are presented, where in each a bowtie antenna is used as radiating element and a mushroom-like EBG structure is used as its High Impedance ground-plane, with vias for one design, and without the vias for the other.
Keywords :
antenna radiation patterns; bow-tie antennas; conformal antennas; evolutionary computation; method of moments; photonic band gap; EP; MoM based simulator; bandwidth performance enhancement; constrained evolutionary programming; design enhancement; high impedance ground-plane; high-impedance surfaces; mushroom-like EBG structure; printed wideband antennas; radiating element; semi-conformal bowtie antenna structures; Antennas; Bandwidth; Impedance; Optimization; Surface impedance; Surface waves;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2013 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4673-5315-1
DOI :
10.1109/APS.2013.6710796
