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Antenna Array

Antenna array

Complex directional antenna consists of separate near-omnidirectional antennas (radiating elements) positioned in the space and driven by high-frequency …

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... spherical antenna ( ). Other methods of exciting, which allow to get maximum CDD of non-superdirective antenna have significant oscillations of amplitude and phase, which makes it difficult to use them. For the case of exciting a half−sphere with current (1), DD were calculated using an approximate method. Fig.1 DD of spherical antenna, kR =20: — strict computation; — approximation; — DD of the flat aperture. Fig. 1 presents DD of the spherical antenna in case the half-sphere is excited computed using strict and approximate formulas. Also, for the sake of comparison, DD of the flat uniformly excited aperture is ...
Modified: 01/10/2007
Tags: spherical , antenna , approximation , current
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