Title :
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
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;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2005 IEEE
Print_ISBN :
0-7803-8883-6
DOI :
10.1109/APS.2005.1552723
