Electrooptic mapping and finite-element modeling of the near-field pattern of a microstrip patch antenna

Author

Yang, Kyoung ; David, Gerhard ; Yook, Jong-Gwan ; Papapolymerou, Ioannis ; Katehi, Linda P B ; Whitaker, John F.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA

Volume

48

Issue

2

fYear

2000

fDate

2/1/2000 12:00:00 AM

Firstpage

288

Lastpage

294

Abstract

A comprehensive electrooptic field-mapping technique is applied to the characterization of near-field radiation patterns above a microstrip patch antenna. The amplitude and phase maps of three orthogonal electric-field components, measured using electrooptic crystals above the patch, also have revealed the transition from the near field to the far field of the radiation pattern. In addition, experimental results have been compared with a finite-element method (FEM) simulation. The measurememts show superior results to the FEM simulation, especially in terms of spatial resolution and data acquisition times. Furthermore, the scattering parameter S₁₁ for the patch antenna has been calculated from the electrooptic measurement results of standing waves on the feeding line and compared with results from a conventional network analyzer

Keywords

S-parameters; antenna radiation patterns; antenna testing; antenna theory; electro-optical devices; finite element analysis; microstrip antennas; microwave measurement; FEM simulation; amplitude maps; data acquisition times; electrooptic field-mapping technique; electrooptic measurement; feeding line; finite-element modeling; microstrip patch antenna; near-field pattern; orthogonal electric-field components; phase maps; radiation pattern characterisation; scattering parameter; spatial resolution; standing waves; Antenna measurements; Antenna radiation patterns; Crystals; Electric variables measurement; Finite element methods; Microstrip antennas; Near-field radiation pattern; Patch antennas; Phase measurement; Spatial resolution;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.821779

Filename

821779