Abstract
The accuracy of a spherical wave expansion is examined
when the expansion is calculated from incomplete data of
the radiation pattern, i.e., when field data on a part of
the far-field sphere is missing. The effect of antenna
size and truncation index on the interpolation capacity
of a SWE is examined by using an analytical expression
for the radiation pattern of wire antennas of different
lengths. The error of
the SWE is seen to increase drastically when the smallest
diameter of the dead zone surpasses the length of a
period of the highest included wave function. The
influence of the size and shape of the dead zone is
studied by the aid of a measured pattern, of which a part
of the field data is ignored. Two different ways are
proposed for estimating the accuracy of the obtained SWE
in a practical instance, when the field in the dead zone
is unknown.
| Original language | English |
|---|---|
| Pages (from-to) | 185-204 |
| Journal | Progress in Electromagnetics Research (PIER) |
| Volume | 52 |
| Publication status | Published - 13 Dec 2004 |
| MoE publication type | D1 Article in a trade journal |