Title :
Analytical calculation of the impedance of lossy power/ground planes
Author :
Eged, Bertalan ; Balogh, László
Author_Institution :
Dept. of Microwave Telecommun., Budapest Univ. of Technol. & Econ., Hungary
Abstract :
Power and ground planes are required to have low impedance over a wide range of frequencies. Parallel ground and power planes in multilayer printed-circuit boards exhibit multiple resonances, which increase the impedance. Dissipative loading the radial transmission line structure of the planes reducing the peaks of the resonances. The dissipative loads can be realized by resistors distributed on the surface or edges of plain pairs and lossy dielectric material can be applied for distributed loading. Calculations based on the analytical method and measurements results are presented for comparing to the calculated and simulated impedances
Keywords :
S-parameters; distributed parameter networks; electric impedance; equivalent circuits; power transmission lines; transmission line theory; two-port networks; 2D transmission lines; dissipative loading; distributed resistors; equivalent circuit model; impedance calculation; lossy dielectric material; lossy ground planes; lossy plain pairs; lossy power planes; mode number truncation; multilayer printed-circuit boards; multiple resonances; parallel ground/power planes; radial transmission line structure; Dielectric losses; Dielectric materials; Dielectric measurements; Frequency; Impedance measurement; Nonhomogeneous media; Power transmission lines; Resistors; Resonance; Surface impedance;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2001. IMTC 2001. Proceedings of the 18th IEEE
Conference_Location :
Budapest
Print_ISBN :
0-7803-6646-8
DOI :
10.1109/IMTC.2001.928228
