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

fYear

2013

fDate

7-13 July 2013

Firstpage

270

Lastpage

271

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium (APSURSI), 2013 IEEE

Conference_Location

Orlando, FL

ISSN

1522-3965

Print_ISBN

978-1-4673-5315-1

Type

conf

DOI

10.1109/APS.2013.6710796

Filename

6710796