Title :
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
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;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2010.2071358
