The effects of source and load impedance on radiation efficiency and diversity gain of two parallel dipoles

Author

Rosengren, Kent ; Kildal, Per-Simon

Author_Institution

Flextronics Antenna, Kalmar, Sweden

fYear

2005

fDate

3-8 July 2005

Firstpage

2

Abstract

The embedded element patterns of two parallel half-wavelength dipoles are calculated for various source impedances and dipole spacings. The radiation efficiency, correlation and effective diversity gains are shown to vary with source impedances. With 50Ω source impedance, the results compare well to those obtained from measurements in a reverberation chamber. The maximum effective diversity gain seems to appear when the source impedance is conjugate matched to the input impedance of the embedded dipole element, and not for the source impedance maximizing the radiation efficiency.

Keywords

antenna radiation patterns; dipole antenna arrays; diversity reception; impedance matching; 50 ohm; correlation; dipole spacings; embedded element patterns; half-wavelength dipoles; input impedance matching; load impedance; maximum effective diversity gain; parallel dipoles; radiation efficiency; source impedance; Degradation; Dipole antennas; Diversity methods; Equivalent circuits; Impedance matching; Impedance measurement; Mutual coupling; Radio transmitters; Receiving antennas; Reverberation chamber;

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.2005.1552723

Filename

1552723