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This paper demonstrates, for the first time, a circuit-level approach to the analysis of pulse-ultrawideband (UWB) receiver front ends in the presence of interfering communication signals. The procedure is based on a model-order-reduction harmonic-balance technique based on Krylov subspaces. A sophisticated algorithm for performing matrix-vector(More)
This paper discusses some modern trends in nonlinear (NL) microwave circuit optimization based on electromagnetic (EM) simulation. In order to keep the CPU time required for a typical design within acceptable limits, the number of expensive EM analyses must be kept under tight control. This may be obtained by resorting to a systematic implementation of some(More)
This paper discusses a self-consistent set of modern computational concepts providing an effective approach to the circuit-level harmonic-balance (HB) simulation of nonlinear microwave systems of complex topology. The system is automatically split into the interconnection of a near-optimal number of nonlinear blocks at run time. The resulting structure is(More)
Harmonic-balance (HB) based nonlinear techniques are exploited for the design of a high-efficiency and medium-power switching mode oscillator, used as continuous power source in a wireless power transmission system. The oscillator power is transmitted through resonant coils over variable distances. To account for the resonant frequency variations, which(More)
In this paper, we describe a rigorous theoretical approach to the circuit-level nonlinear design of an entire inductive resonant wireless power transfer (IR-WPT) system, including the transmitter and receiver nonlinear subsystems. Starting from a novel analytical characterization of the inductive resonant link, the system efficiency is parametrically(More)
In magnetic resonant wireless power transfer the free-space part of the link is realized by using coupled inductances and by adding appropriate series capacitances (so as to obtain resonance). By introducing appropriate reactive matching networks, we remain with a two port lossy network. In this work it is shown that, by taking as reference impedance the(More)
The paper describes a general and rigorous procedure for the analysis/design of Impulse Radio-UWB links, based on the concurrent use of circuit-level and full-wave approaches. The general-purpose CAD approach here described takes into account all the phenomena which can affect the link performance: such as electromagnetic couplings between parts of the(More)
In this paper the feasibility of achieving a coupling-independent performance for a Wireless Power Transfer Link based on resonant inductive coupling is investigated. Theoretical and experimental results demonstrating that a coupling-independent regime can be realized by an appropriate selection of the operating frequency of a strongly-coupled synchronous(More)
The paper discusses a rigorous simulation of reconfigurable integrated antennas operated by MEMS switches, based on a combined nonlinear/electromagnetic (EM)/structural approach. The patch antenna is characterized as a linear multiport network by EM analysis. The MEMS are described as nonlinear components by means of their structural-based electromechanical(More)
We propose a nonlinear model of a resistive MEMS switch. We describe the nonlinear behaviour of the switch by exploiting an extended harmonic balance (HB) technique allowing the efficient calculation of distortion effects due to MEMS nonlinearities. A comparison with the corresponding capacitive model is also given. As an illustrative example, the results(More)