Computational modeling demonstrates accurate dispersion and loss calculations in asymmetric coplanar waveguides, highlighting efficient alternatives to full-wave electromagnetic simulations.
In this paper, we reformulate the quasi-static spectral domain analysis (SDA) applicable to a lossy anisotropic multilayer asymmetric coplanar waveguide (ACPW). The SDA formulation also incorporates two-layer model of a conductor thickness and the concept of efiective permeability to account for the low frequency dispersion due to the magnetic fleld penetration in an imperfect conductor. The paper further presents the single layer reduction (SLR) formulation and circuit model to compute frequency dependent line parameters of a lossy anisotropic multilayer ACPW. The accuracy of formulation is comparable to that of the HFSS and CST, without using complex and time consuming full-wave methods. The results of CST for efi , Z0, fid, fic of multilayer ACPW, in the frequency range 1GHz{100GHz, deviate from results of HFSS up to 0.49%, 1.53%, 2.06% and 10.73% respectively; whereas corresponding deviations of the present SDA and SLR combined formulation are up to 1.38%, 2.09%, 3.57% and 8.87%.
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Verma et al. (2013) studied this question.
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