&&act-The active RC simulation of LC filters is of interest, due to the excellent sensitivity properties thereby obtained. Most known designs of active RC driving-point impedances necessary for the simulation of an LC filter, require two opamps per impedance. In this paper a method is presented that realizes general second-order driving-point impedances with only one opamp and with a minimum nu...

We investigate the ratchet dynamics of nonlinear Klein-Gordon kinks in a periodic, asymmetric lattice of pointlike inhomogeneities. We explain the underlying rectification mechanism within a collective coordinate framework, which shows that such a system behaves as a rocking ratchet for point particles. Careful attention is given to the kink width dynamics and its role in the transport. We also...

Efficient operation of distribution grids in the smartgrid era is hindered by the limited presence of real-time nodal and line meters. In particular, this prevents easy estimation of grid topology and associated line parameters that are necessary for control and optimization efforts in the grid. This paper studies the problems of topology and parameter estimation in the limited observability re...

In this work, we present a critical s tudy of the circuit relations for two distant coupled antennas: either both are transmitting, or one is transmitting a n d one is receiving. W e found that Carter’s two mutual impedances , Z t2 and Z 2 , , a r e not applicable to t h e s e two c a s e s . Two sets of circuit relations have been formulated, with two sets of wave impedances , to characterize ...

Impedance-based stability analysis normally splits an interconnected system into source and load subsystems and the stability of the closed loop system can be analyzed by the combined input-output gains of source and load. This is an intuitive approach in the case of Single-Input Single-Output (SISO) systems. However, in the case of grid-tied voltage source converter (VSC) systems, dq impedance...

Grazing incidence specular and diffuse X-ray scattering measurements have been used to study variations in polishing of InP single crystal wafers. Excellent agreement between experimental and simulated data is achieved when graded surface layers typically 3081 in thickness, and of higher density than the bulk material, are included. Figuring was found on all samples examined and the width of th...

The use of sagittally bent asymmetric Laue crystals in horizontally focusing monochromators for high-energy synchrotron X-rays necessitates simulation of the X-ray reflectivity by such crystals. Based on the theory of the lattice distortion in the diffraction plane of sagittally bent Laue crystals, a lamellar model was developed to predict their rocking curves. The model was experimentally veri...

A simple and analytical design methodology for a novel multi-way Bagley Polygon power divider with arbitrary complex terminated impedances is proposed in this paper. The design parameters including electrical lengths and characteristic impedances can be obtained by the provided closed-form mathematical expressions when complex terminated impedances are known. Moreover, for convenient test, we d...

We introduce algorithms for optimizing a single-input single-output reconfigurable intelligent surface (RIS) assisted system. The RIS is modeled by using an electromagnetic-compliant framework based on mutual impedances and its reconfigurability realized through tunable lumped impedances. In the absence of coupling among scattering elements RIS, we derive closed-form expression optimal impedanc...