What is Nonreciprocity? – Part II
نویسنده
چکیده
This paper is the second part of a two-part paper on Electromagnetic (EM) Nonreciprocity (NR). Part I has given a general definition of NR, pointed out that linear NR is a stronger form of NR than nonlinear (NL) NR, explained EM Time-Reversal (TR) Symmetry (TRS) Breaking (TRS-B), described linear Time-Invariant (TI) NR media, generalized the Lorentz reciprocity theorem for NR, and provided a physical interpretation of the resulting Onsager-Casimir relations [1]. This part first clarifies the TR paradox in lossy and open systems, and points out the TR-similarity between open and lossy systems. Next, it proposes an extended version of the S-parameters to fully or partly model all NR systems. Then, it presents the fundamentals of linear-TI (LTI) NR, linear Time-Variant (LTV) Space-Time (ST) modulated NR and NL NR systems. Finally, it removes typical confusions between asymmetric and NR systems.
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