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Kinetic inductance is an important property of carbon nanotubes (CNTs) in high-frequency applications. However, disagreements exist in whether the kinetic inductance of CNTs is present in the diffusive transport regime. In this paper, we fabricated the horizontally aligned multiwalled nanotube (MWNT) arrays on silicon substrates and investigated the inductance properties of the MWNT arrays with different...
Shielding structures intended to improve the performance of millimeter-wave transformers are presented. The loss mechanisms of the components are discussed and the losses related to the silicon substrate are shown to be the most relevant. A patterned ground shield and a floating shield are detailed and their influences in terms of inductance, quality-factors, coupling coefficients and minimum insertion...
On-chip spiral inductors with high quality factors are very important in many RF circuits. In this paper, spiral inductors are analyzed to study the influence of substrate and spiral structure on an inductor's performance in the multi-GHz frequency range. Firstly, the inductors with different substrate conductivity, thickness and permittivity of the dielectric layer are compared, and a general guide...
A compact circuit model for predicting performance parameters of multi-layer inductors is proposed in this paper. This model, which does not use any fitting and optimized parameters, modeled eddy currents loss in the silicon substrate, skin and proximity effects in metal tracks, which is combined with partial element equivalent circuit (PEEC) method. Excellent agreements are obtained between the modeled...
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