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Numerical evaluation of radiation integrals for reflector antenna analysis including a new measure of accuracy

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3 Author(s)
Stutzman, W.L. ; Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA ; Gilmore, S.W. ; Stewart, S.H.

Results are presented for an investigation of popular numerical integration methods applied to the reflector antenna problem. The comparison of methods is facilitated by the introduction of a new figure-of-merit (the p-factor), which is a measure of how far out in pattern-space the results are accurate. The p-factor can also be used to determine how dense a sampling grid is required for a given pattern accuracy. Results of the comparison show that Gauss-Zirnike polynomial integration on the diameter and the trapezoidal rule on the circumference was the most accurate method tested. Somewhat less accurate but still good methods were the Gauss-Legendre/trapezoidal and Gauss-Legendre/Gauss-Legendre methods.<>

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:36 ,  Issue: 7 )

Date of Publication:

July 1988

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