Title: Synthesis of scattering parameter polynomials for digital models of microstrip structures utilising opened and short-circuited stubs

Authors: Biljana P. Stošić

Addresses: Faculty of Electronic Engineering, University of Niš, Aleksandra Medvedeva 14, 18000 Niš, Serbia

Abstract: An efficient approach for direct counting of polynomial coefficients of rational scattering parameter functions in z-domain for planar microstrip structure utilising opened and short-circuited stubs is described here. Wave digital networks (WDNs) which represent digital models of microstrip structures are observed. WDNs are generally seen as a combination of multiport subnetworks. Response in WDNs – the network scattering parameters are obtained by use of wave matrices. An ultra-wideband filter and two structures with cross-junction opened stubs realised in microstrip technique, proving the response accuracy of the new technique, are given.

Keywords: wave digital networks; microwave circuits; short-circuited stubs; ultra-wideband filters; cross-junction opened stubs; microstrip structures; digital models; modelling; network scattering.

DOI: 10.1504/IJRIS.2012.046489

International Journal of Reasoning-based Intelligent Systems, 2012 Vol.4 No.1/2, pp.28 - 38

Available online: 09 Apr 2012 *

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