Title :
Time domain measurement of mode characteristics in coupled microstrip lines
Author_Institution :
ERSO/Ind. Technol.Res. Inst., Hsinchu, Taiwan
Abstract :
The even and odd mode impedances of coupled microstrip lines on a printed circuit board were calculated by a numerical method and measured by time-domain reflectometry (TDR). The capacitance matrix of the coupled lines was calculated by the method of moments. The mode impedances were obtained by utilizing a similar transformation. Measured results were found to be in good agreement with calculated data. The electromagnetic radiation characteristics of coupled lines were also observed in the time domain using a transverse electromagnetic (TEM) cell. The radiated waveform of the even mode was found to be different from that of the odd mode. The timing relationship was clearly demonstrated by the time-domain results, which provide useful information on the transient radiation characteristics of the coupled lines
Keywords :
electric impedance; matrix algebra; method of moments; microstrip lines; printed circuits; time-domain reflectometry; TEM cell; capacitance matrix; coupled microstrip lines; electromagnetic radiation characteristics; even mode impedance; method of moments; numerical method; odd mode impedances; printed circuit board; radiated waveform; time domain measurement; time-domain reflectometry; time-domain results; timing relationship; transient radiation characteristics; transverse electromagnetic cell; Coupling circuits; Electromagnetic coupling; Electromagnetic measurements; Electromagnetic radiation; Impedance measurement; Microstrip; Printed circuits; Reflectometry; Time domain analysis; Time measurement;
Conference_Titel :
Electromagnetic Compatibility, 1993. Symposium Record., 1993 IEEE International Symposium on
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-1304-6
DOI :
10.1109/ISEMC.1993.473742
