Improvements of Spectral Domain Analysis Techniques for Arbitrary Planar Circuits

From static approximations to full‐wave analysis: The analysis of planar line discontinuities

“…Further improvements of the state of the art, as have been described in ref. 95. can be found as follows: a problem which leads to large computation time is the integration of the dyadic Green's function near the surface wave poles.…”

“…Rautio [82], for the first time, used these expansion functions for the analysis of a simple microstrip discontinuity (open end), and Wertgen and Jansen [87,88] developed it to a flexible design tool. This method and several improvements [95] shall be presented here subsequently.…”

“…Figure 20. Surface current density distribution (a) and reflection coefficient of a radial stub structure with closely coupled bend discontinuities calculated with a spectral domain analysis technique by Wertgen [87] (.....) , by Becks [95] ( -), and compared with measured results (M) (b). Substrate and geometry: A l z 0 3 , E, = 9.768, tand 6 = 0.0003, height = 635 pm, linewidth 610 prn, radius = 3.253 mm gap width 305 pm.…”