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Analysis of Equivalent Circuit Approach for Ridge Type CPW Traveling - Wave Structure  

윤상준 (중앙대학교 전자공학과)
공순철 (중앙대학교 전자공학)
옥성해 (중앙대학교 전자공학)
윤영설 (중앙대학교 전자공학)
구민주 (중앙대학교 전자공학)
박상현 (중앙대학교 전자공학)
최영완 (중앙대학교 전자공학과)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.41, no.3, 2004 , pp. 45-54 More about this Journal
Abstract
Microwave characteristics of ridge type CPW traveling-wave(TW) electroabsorption modulator and photodetector are affected by the thickness of intrinsic layer, width of guiding layer, and the separation of signal and ground electrodes. These factors are determined effective index of microwave and characteristic impedance due to changing of capacitance(C) and inductance(L) of device. However, conventional equivalent circuit of TW-structure is approximated to microstrip and CPW transmission line by distribution of electric and magnetic fields, respectively. In this paper, we analyzed microwave characteristics of TW-structure and found more accurate value of C and L by using finite difference time domain (FDTD) method. These values are adopted circuit element of equivalent circuit. Microwave characteristics obtained by the FDTD and equivalent circuit model show good agreement.
Keywords
Traveling wave electro-absorption modulator; Photodetector; Equivalent circuit; Finite differential time domain method;
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Times Cited By KSCI : 1  (Citation Analysis)
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