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本帖最后由 rocksyh 于 2015-8-11 23:16 编辑
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+ Z* H; O; O5 h5 ~9 J1 _; L我所了解的内容如下:
! ^( e3 ]3 @5 h5 v6 YD-Sarkar 模型 是特别针对PCB的RF4介质基板建立色散模型公式的:The Djordjevic-Sarkar model is a causal frequency-dependent dielectric model developed specifically to model the FR-4 epoxy resin material used commonly in printed circuit boards. It is also useful for many other low-loss insulator materials.
, r- W! h. B0 E* h8 x5 [! ~具体的可以参考IEEE的这篇文档:A. R. Djordjevic, R. D. Biljic, V. D. Likar-Smiljanic and T. K. Sarkar, "Wideband Frequency-Domain Characterization of FR-4 and Time-Domain Causality," IEEE Trans. on Electromagnetic Compatibility, Nov. 2001, p. 662. / e/ b3 N* }( ~, P4 M
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Debye模型应该是根据介质的极化损耗机理来建立色散模型公式的,适用的频率范围非常宽,可以从DC到光波,应该更具通用性。
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但是我觉得PCB的仿真的话用D-Sarkar 模型应该会更加准,毕竟这个色散模型是专门针对PCB 的板材的。但是话说回来,高阶的德拜模型是极其精准的。
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