The accuracy of microstrip radial stub computer-aided design (CAD) models is investigated both experimentally and against electromagnetic simulations. A dual-resonator technique is used to eliminate confounding variables and to obtain accurate experimental data. This technique is extended beyond the earlier perturbation analysis applied to discontinuities to enable checking models that have significant electrical length. Model phase errors in excess of 16° have been found for the microstrip radial stub. © 2000 John Wiley & Sons, Inc. Int J RF and Microwave CAE 10: 95–107, 2000

Investigation of microstrip radial stub CAD models from 2 to 60 GHz

A software verification effort to verify the accuracy of the simulation program developed by the Center for Microwave/Millimeter-Wave Computer-Aided Design (MIMICAD) is described. A set of single-layer microstrip structures selected by the MIMICAD sponsors were fabricated on GaAs substrates for testing purposes. Ranging from an interdigitated capacitor to radial stubs to a section of meander line, these test structures are components commonly used in MMIC designs. Round-robin measurements of the test structures were carried out among the MIMICAD sponsors to assess measurement consistency. Comparisons between the measured and simulated results as well as the effect of discretization in the simulation process are discussed.

Robert J. Furlow

Papers

Software verification effort at the MIMICAD center for microstrip passive components