NDLI: Integral equation approximation to microwave specific attenuation by distorted raindrops: the spheroidal model

Content Provider	IEEE Xplore Digital Library
Author	Li, L.W. Kooi, P.S. Leong, H.S. Yeo, T.S.
Copyright Year	1995
Description	Author affiliation: Dept. of Electr. Eng., Nat. Univ. of Singapore, Singapore (Li, L.W.; Kooi, P.S.; Leong, H.S.; Yeo, T.S.)
Abstract	An integral equation approximation together with a perturbation technique and the spherical vector eigenfunction expansion method is employed in this paper to investigate the microwave attenuation by arbitrarily-distorted raindrops. The electromagnetic fields outside the distorted raindrop scatterers are considered as the sum of the incident wave fields and the scattered fields due to the spheroids. Both direct and scattered waves are expressed in terms of integrals containing a volumetric current distribution located at infinity and the dyadic Green's functions. A method of obtaining the volumetric current distribution of the assumed source that generates the plane waves, is developed in the paper and the current distribution of such a source is derived. Under the first-order approximation, the scattered fields expanded are represented analytically and compared with those published previously, although the derivation itself of the scattered fields does not require such an expansion. As an application, the spheroidal raindrops are investigated specifically and the expansion coefficients of the scattered fields are derived analytically to demonstrate the applicability of the method presented here. Numerical results of the extinction cross sections and the specific attenuations are obtained. The specific attenuations computed numerically are also compared with the updated specific attenuation data collected in Singapore.
Starting Page	658
Ending Page	662
File Size	629654
Page Count	5
File Format	PDF
ISBN	0780325796
DOI	10.1109/SICON.1995.526370
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-07-03
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Integral equations Attenuation Electromagnetic scattering Current distribution Perturbation methods Eigenvalues and eigenfunctions Microwave theory and techniques Electromagnetic fields H infinity control Green's function methods
Content Type	Text
Resource Type	Article

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