Artificial Impedance Surfaces for Reduced Dispersion in Antenna Feeding Systems

Author

Goussetis, George ; Gómez-Tornero, José Luis ; Feresidis, Alexandros P. ; Uzunoglu, Nikolaos K.

Author_Institution

Inst. of Electron. Commun. & Inf. Technol., Queen´´s Univ. Belfast, Belfast, UK

Volume

58

Issue

11

fYear

2010

Firstpage

3629

Lastpage

3636

Abstract

An impedance surface is presented that reduces the dispersion experienced upon propagation of broadband pulses within rectangular waveguides. The surface impedance is selected so that, within a frequency range, the transverse resonance condition is satisfied for longitudinal wavenumber that varies linearly with frequency. A synthesis procedure for practical surface topologies consisting of periodic dipole arrays is described. An example involving a finite structure is employed to illustrate the reduced dispersion. Numerical simulation results obtained from in-house mode-matching method as well as HFSS are presented. A prototype is fabricated and tested experimentally validating the theoretical predictions.

Keywords

antenna feeds; dipole antenna arrays; dispersion (wave); frequency selective surfaces; mode matching; numerical analysis; rectangular waveguides; surface impedance; HFSS; antenna feeding systems; artificial impedance surfaces; broadband pulse propagation; dispersion reduction; in-house mode-matching method; longitudinal wavenumber; numerical simulation; periodic dipole antenna arrays; rectangular waveguides; surface topology; transverse resonance condition; Admittance; Dispersion; Impedance; Optical waveguides; Surface impedance; Surface waves; Artificial surfaces; dispersion compensation; frequency selective surfaces; pulse transmission; surface impedance; waveguide dispersion;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2010.2071358

Filename

5559375