Enlarged half-wavelength resonator antenna with enhanced gain

Author

Rennings, A. ; Otto, S. ; Caloz, C. ; Waldow, P.

Author_Institution

Dept. of Electr. Eng., Duisburg-Essen Univ., Duisburg, Germany

fYear

2005

fDate

3-8 July 2005

Firstpage

683

Abstract

A concept of gain enhancement by radiation aperture enlargement has been presented. The nonlinear dispersion relation of a CRLH TL has been used to enlarge the antenna length keeping the resonance frequency nearly constant. It has been shown that the gain is strongly dependent on the size of the radiation aperture. This fact supports the idea that the x-component of the electric field in the interdigital capacitors of the unit cells is the main contribution to the radiation aperture and is also in agreement with the far-field polarization. A maximum gain of 10.7 has been reached for the largest antenna with 18 unit cells.

Keywords

antenna arrays; antenna radiation patterns; aperture antennas; capacitors; dispersion (wave); electric fields; electromagnetic wave polarisation; gain measurement; CRLH TL; electric field x-component; enhanced gain; enlarged half-wavelength resonator antenna; far-field polarization; interdigital capacitors; nonlinear dispersion relation; radiation aperture enlargement; Antenna measurements; Antenna theory; Apertures; Microstrip antennas; Patch antennas; Resonance; Resonant frequency; Transmission line matrix methods; Transmission line theory; Virtual prototyping;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 2005 IEEE

Print_ISBN

0-7803-8883-6

Type

conf

DOI

10.1109/APS.2005.1552346

Filename

1552346