Green's Function Approach for Obtaining S-Matrices of Multimode Planar Networks

Frequency and time domain analysis of microstrip lines with multiple right-angle bend discontinuities

“…The S-parameters for the ®rst three modes for the single bend case are computed and compared in ®gure 2 with the results given by Chadha and Gupta (1983, ®gure 2). In these computations the geometric and material parameters are taken to be the same as used by Chadha and Gupta (1983). Close agreement has been found between the results for all the modes and at all frequencies except near cuto frequencies of higher order modes.…”

“…Thus quasi-TEM mode approximation may fall short of the situation and full wave analysis is required to evaluate correctly the characteristics of the transmission structures. Chadha and Gupta (1983) have given a method using a Green's function approach to ®nd frequency-dependent scattering parameters (S-parameters) of a right-angle bend, taking into account higher-order modes. S-parameters are computed using a planar waveguide model and a modematching technique for a bend with arbitrary angle and Y-junction (Mehran 1978) and for T-junction (Menzel and Wol 1977).…”

“…The formulations for S-parameters and TDR of the bend structures are given in } 2. S-parameters for the ®rst three modes obtained by the mode-matching technique for a line with a single right-angl e bend are compared with the results given by Chadha and Gupta (1983) in } 3. The frequency and time domain responses for di erent double bend structures on epoxy substrates are computed.…”

Optimization of uniaxial perfectly matched layer parameters for finite difference time domain simulation and application to coupled microstrip lines with multiple bend discontinuities

“…A planar-lumped model was used in [3] for the analysis of coupled microstrip lines with discontinuities, but for high-speed applications this approach may not yield accurate results. A full-wave analysis of a single microstrip line with single and multiple bends was carried out using the mode matching technique [4,5] and Green's function approach [6]. The method of moments [7] and the spectral domain method [8] were also used to study the effects of discontinuities in microstrip lines.…”

Analysis of microstrip multiport junctions using the multimode boundary integral method

“…In most analyses, the dominant mode only is assumed in the formulation. Multimode analysis is rarely found, except in [l] and [2]. In [l], the electric and magnetic fields on the boundary were expressed using the equivalent waveguide model.…”