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Maximizing the effective diversity gain of two parallel dipoles by optimizing the source impedances
Author(s) -
Rosengren Kent,
Carlsson Jan,
Kildal PerSimon
Publication year - 2006
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.21400
Subject(s) - dipole antenna , diversity gain , dipole , electrical impedance , antenna (radio) , physics , microwave , method of moments (probability theory) , electronic engineering , input impedance , acoustics , computational physics , engineering , computer science , electrical engineering , telecommunications , mathematics , beamforming , mimo , statistics , quantum mechanics , estimator
The embedded element patterns of two parallel half‐wavelength dipoles are calculated for various source impedances and dipole spacings by using classical formulas for self and mutual impedances. These are used to calculate the effective diversity gain, which is shown to vary with source impedances and dipole spacing. The results are verified using a method of moments (MoM) code for wire antennas and via measurements in a reverberation chamber. The numerical model is used to find the source impedances that maximize the effective diversity gain, which has a maximum for the computed cases when the source impedances are conjugate‐matched to the input impedances of each of the embedded dipole elements. Then the two antenna ports are uncorrelated. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 532–535, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21400