15 August 2011 Compact equivalent-circuit model of LiNbO3 modulator for passive millimeter wave imaging system
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Abstract
This paper presents a compact frequency-independent equivalent-circuit model for mmW characteristics of lithium niobate (LiNbO3) optical modulator, taking the skin effect, and substrate effect into consideration. Equivalent-circuit model with only ideal lumped elements represents the broadband electrical response of LiNbO3 modulator. A 4-long ladder model is used to model the skin effect. Coupling capacitor is used to simulate the substrate coupling from the CPW to the buffer and LiNbO3 substrate. Lumped-element circuit model was cascaded to model the distributive skin effect, transmission attenuation, and substrate effect. The equivalent-circuit models are fully SPICE compatible and can be incorporated directly into common circuit simulators and microwave design tools.
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Feng-chen Qian, Xiao-ping Xie, Ya-lin Ye, "Compact equivalent-circuit model of LiNbO3 modulator for passive millimeter wave imaging system", Proc. SPIE 8196, International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, 81961L (15 August 2011); doi: 10.1117/12.900869; https://doi.org/10.1117/12.900869
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