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本帖最后由 rocksyh 于 2015-8-11 23:16 编辑 7 P! h; l9 Y( | S3 M. Q
( f: h% |/ B( q6 N" S/ n1 R; Q7 [我所了解的内容如下:
f2 g) O2 k' p5 R6 h' OD-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.: U4 K4 F) n* w% {, Q0 }" S) L
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. * Q0 j# d& K. q5 ^
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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。) ~/ t0 ~: J0 _: N
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