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Effect of a Finite Ground Plane on the S-Parameter between Two Dipole Elements

Katsumi FUJII, Takashi IWASAKI

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Summary :

The transmission S-parameter, S21, between dipole elements on a rectangular finite ground plane is calculated by the MoM with planar-segments in the horizontally and vertically polarized configurations. Supposed a 1/10 scaling, the frequency range is selected 0.15-0.8 GHz. The size of the finite ground plane is 40 cm 100 cm. The dipole-element length is 18.8 cm (half-wavelength at 0.8 GHz). The distance between dipole elements is 30 cm. The results are compared to the calculated results with the conventional MoM-GTD hybrid method and also the measured results with a TRL-calibrated network analyzer. It makes clear that the MoM-GTD hybrid method is not applicable to a small ground plane in the vertically polarized configuration. The results calculated by the MoM with planar-segments agree well to the measured results both in the horizontal and vertical polarizations. The results show that the size of the finite ground plane for the vertical polarization should be much larger than for the horizontal polarization.

Publication
IEICE TRANSACTIONS on Communications Vol.E84-B No.2 pp.344-348
Publication Date
2001/02/01
Publicized
Online ISSN
DOI
Type of Manuscript
LETTER
Category
Electromagnetic Compatibility(EMC)

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