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A simple approach to closed‐form Green's functions of microstrip structures
Author(s) -
Chen Hongyu,
Shen Zhongxiang,
Li Erping
Publication year - 2005
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.20846
Subject(s) - inverse , microstrip , hankel transform , simple (philosophy) , exponential function , transformation (genetics) , microwave , mathematics , algorithm , mathematical analysis , computer science , geometry , electronic engineering , engineering , telecommunications , fourier transform , philosophy , biochemistry , chemistry , epistemology , gene
The spectral‐domain Green's functions for open microstrip structures are expressed in terms of pole‐residue expressions by a vector‐fitting technique after extracting the quasi‐dynamic images. After the inverse Hankel transformation, the spatial Green's function takes the form of summing up a series of Hankel functions plus the quasi‐dynamic exponential terms. This simple approach avoids the difficulty of manually extracting the surface‐wave poles required in the traditional discrete complex image method (DCIM), while retaining the high accuracy of the closed‐form expressions in the near‐field region. The numerical results for the Green's functions of one‐layer and two‐layer structures verify the validity and efficiency of this approach. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 45: 435–438, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20846