Closed-form Jones matrix of dual-polarized inverted-vee dipole antennas over lossy ground

R.A.C. Baelemans, A.T. Sutinjo, P.J. Hall, A.B. Smolders, M.J. Arts, E. de Lera Acedo

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This paper presents a closed-form expression for the Jones matrix of a dual-polarized inverted-vee dipole antenna based on the Lorentz reciprocity theorem and the basic rules of electromagnetic refraction. The expression is used to determine the intrinsic cross-polarization ratio (IXR) as a function of droop angle, position of the source in the sky, antenna height, frequency, and reflection coefficient of the underlying ground. The expression is verified using full-wave simulations with a method-of-moments solver, showing very good agreement. It explains the increase in the IXR when the antenna is placed over a perfect electric ground plane. This result is used to explain the polarization properties of the Square Kilometre Array Log-periodic Antenna. Through the LOw-Frequency ARray Low-Band Antenna (LOFAR-LBA), the importance of the size of the ground plane is explained. Finally, design consideration for high polarization purity antennas is discussed.
Originele taal-2Engels
Pagina's (van-tot)26-35
Aantal pagina's10
TijdschriftIEEE Transactions on Antennas and Propagation
Nummer van het tijdschrift1
StatusGepubliceerd - 1 jan 2017

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