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Closed form expressions for Green's functions of microstrip structures on a uniaxially anisotropic substrate
Author(s) -
Nelatury Sudarshan R.,
Hoorfar Ahmad
Publication year - 2003
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.10073
Subject(s) - microstrip , anisotropy , planar , substrate (aquarium) , expression (computer science) , dielectric , materials science , microwave , closed form expression , transverse plane , mathematical analysis , term (time) , enhanced data rates for gsm evolution , optics , physics , computational physics , optoelectronics , mathematics , computer science , telecommunications , structural engineering , engineering , quantum mechanics , oceanography , geology , computer graphics (images) , programming language
Abstract Closed form expressions for the Green's functions of a planar microstrip structure on an electrically thin uniaxially anisotropic substrate have been derived. The approach is to first obtain the quasi‐dynamic term and refine its accuracy with a correction term valid for higher frequencies. The quasi‐dynamic term conveys the influence of partial images and includes both transverse and vertical dielectric constants ε rt and ε rz . The correction term, on the other hand, results in an expression that includes ε rz only. Results indicate excellent agreement with exact numerical solution over a significant band of frequencies and over a large range of spatial values. © 2003 Wiley Periodicals, Inc. Int J RF and Microwave CAE 13: 161–168, 2003.