Abstract
Discontinuities in multilayer PCBs and chip packages neglected earlier require special consideration at higher operating frequencies. Digital transmission frequencies of 620 MHz, 1.2 GHz and 2.4 GHz are currently in use. The discontinuities include via holes, coupling between lines, crossovers, line bends, SMA connectors and wirebonds. It is possible to solve Maxwell’s equations numerically for such structures and observe their behavior. This can lead to not only avoiding effects such as dispersion, reflection, resonances, coupling and radiation, but also to the development of simpler models for the discontinuities to be implemented in computer aided design CAD1.
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References
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Pillai, E., Wiesbeck, W. (1995). Derivation of Ultra-Wideband Full Wave Equivalent Circuits for Wirebond Interconnects Using the FDTD Method. In: Carin, L., Felsen, L.B. (eds) Ultra-Wideband, Short-Pulse Electromagnetics 2. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-1394-4_26
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DOI: https://doi.org/10.1007/978-1-4899-1394-4_26
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