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This work investigates the mechanism of generation of undesired common-mode (CM) currents in differential-line interconnects with slight non-uniformity owing to imperfect production process. To this end, three different non-ideal configurations are considered, obtained by perturbation of an ideally-uniform differential interconnect composed of two microstrips. By resorting to modal analysis, the governing...
The characterization of multilayer graphene surface impedance at W-band frequency is addressed for the basic application at W-band. On the Cu foil substrate, small area and continuous graphene films are prepared by chemical vapor deposition method using methane as the catalyst. We have got the once and twice transferred samples, corresponding to 6, 12 layers and they are successfully transferred to...
This paper presents a study of renewable energy system stability based on impedance models of the sources and the grid. The focus is grid-parallel inverters controlled in the current injection mode. System stability analysis based on source output impedance and load input impedance is generalized to current-source systems. Output impedance modeling of current-controlled PWM inverters for grid interface...
The Micropen?? direct-write technique was used to fabricate ceramic skeletal structures to develop ceramic/polymer (2-2) composites for high frequency transducers in medical imaging applications. Both regular and volume fraction gradient (VFG) patterns were designed. By this approach, transducers were fabricated with 1 cm2 transduction area, operating at 4??5 MHz. The composites had ~30 vol% of ceramic,...
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