Analysis of coupled lines in microwave printed circuit elements

Piroğlu, Şefika Özkal
Full wave analysis of microstrip lines at microwave frequencies is performed by using method of moments in conjunction with closed-form spatial domain Green’s functions. The Green’s functions are in general Sommerfeld-type integrals which are computationally expensive. To improve the efficiency of the technique, Green’s functions are approximated by their closed-forms. Microstrip lines are excited by arbitrarily located current sources and are terminated by complex loads at both ends. Current distributions over microstrip lines are represented by rooftop basis functions. At first step, the current distribution over a single microstrip line is calculated. Next, the calculation of the current distributions over coupled microstrip lines is performed. The technique is then, applied to directional couplers. Using the current distributions obtained by the analysis, the scattering parameters of the structures are evaluated by using Prony’s method. The results are compared with the ones gathered by using simulation software tools, CNL/2™ and Agilent Advanced Design System™ (ADS).


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Citation Formats
Ş. Ö. Piroğlu, “Analysis of coupled lines in microwave printed circuit elements,” M.S. - Master of Science, Middle East Technical University, 2007.