Presentation of the spectral electric and magnetic field integral equations used in G2DMULT for analyzing cylindrical structures of multimaterial regions

When dealing with electromagnetic problems of three-dimensional (3D) elements, such as dipoles, microstrip patches, and slots, in the vicinity of two-dimensional (2D) structures, it is very efficient to find the radiation characteristics of the 3D elements and the mutual couplings between them by using a spectrum of 2D solutions (S2DS). G2DMULT is a general algorithm that applies the S2DS technique to calculate the spectral Green's functions of 2D multiregion structures by using the method of moments (MoM). When these spectral Green's functions are used, the spectral electric and magnetic field integral equations (EFIE and MFIE) are needed to solve the 2D problems in the spectral domain. This Letter presents the spectral electric and magnetic field integral equations (EFIE and MFIE), their moment-method solution formulations, and the special expressions needed to handle the discontinuity of some field components at the material boundaries. Several numerical examples show that G2DMULT with these spectral EFIEs and MFIEs can provide accurate results compared with measurements. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 34: 88–93, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10382