Impedance and polarization characteristics of H and IHI slot antennas

Author

Porter, Bradley G. ; Gearhart, Steven S.

Author_Institution

Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA

Volume

48

Issue

8

fYear

2000

fDate

8/1/2000 12:00:00 AM

Firstpage

1272

Lastpage

1274

Abstract

Slot antennas can be end loaded to tune input impedance for use with active devices and to decrease overall slot length at a given resonant frequency. Cross polarization and impedance of end-loaded slots in an H configuration are analyzed. For an H antenna of approximately equal height and width, D-plane cross polarization was found to be -20 dB, and the resonant frequency decreased by 34% over a slot with a length equal to the width of the H. The cross polarization can be reduced with our new IHI configuration, which is introduced. The impedance at the second resonance can be tuned over a range of 26-82 Ω.

Keywords

Galerkin method; dipole antennas; electric impedance; electromagnetic wave polarisation; impedance matching; inductance; resonance; slot antennas; 26 to 82 ohm; D-plane cross polarization; Galerkin´s method; H slot antenna; IHI slot antenna; active devices; cross polarization; electric field basis functions; end loaded antennas; end-loaded slots; impedance characteristics; inductive loading; input impedance; polarization characteristics; resonant frequency; resonant resistance reduction; slot dipole antenna; slot length; slot width; spectral domain; Antenna measurements; Arm; Dielectric substrates; Dipole antennas; Feeds; Geometry; Impedance measurement; Polarization; Resonant frequency; Slot antennas;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.884502

Filename

884502