This work is concerned with the performance of a single degree of freedom electromagnetic energy harvester when subjected to a broadband white noise base acceleration. Firstly, using the Fokker-Planck-Kolmogorov equation, it is shown that Duffing-type nonlinearities can be used to reduce the size of energy harvesting devices without affecting their power output. This is then verified using the ...

We study the current distribution and input impedance of a circular loop antenna in the form of an infinitesimally thin, perfectly conducting narrow strip coiled into a ring. The antenna is located on the surface of an axially magnetized plasma column surrounded by a homogeneous isotropic medium. The current in the antenna is excited by a time-harmonic voltage creating an electric field with th...

dN The field scattered by an antenna contains a component that is the short circuit scattered field normalized by the short circuit current, and a second component that ls the radiation field normalized by the transmitting current and multiplied by a factor (1 r). RCS is the magnitude squared of the difference between two terms, one being the square root of a complex "structural" cross section,...

In this work, an electronically tunable universal voltage-mode biquadratic filter with single input and five outputs is introduced. The proposed filter structure only employs three differential difference current conveyor transconductance amplifiers (DDCCTAs) and two grounded capacitors without needing any external passive resistor. All the five standard biquadratic filter functions; lowpass, b...

Serrated Microstrip Antennas are gaining their importance in the applications of dual and multiband antenna systems. A Serrated cutting edge has many small points of contact with the material being cut. The Serrations are mainly used in the Compact Antenna Test Range (CATR) measurements for the measurement of antenna parameters. In Serrations, by having less contact area than a smooth blade or ...

For an internal conductivity image, magnetic resonance electrical impedance tomography MREIT injects an electric current into an object and measures the induced magnetic flux density, which appears in the phase part of the acquired MR image data. To maximize signal intensity, the injected current nonlinear encoding ICNE method extends the duration of the current injection until the end of the M...

We consider the design of the front-end receiver for broadband power line communications. We focus on the design of the input impedance that maximizes the signal-to-noise ratio (SNR) at the receiver. We show that the amplitude, rather than the power, of the received signal is important for communication purposes. Furthermore, we show that the receiver impedance impacts the amplitude of the nois...

This paper presents a static electrical impedance tomography (EIT) technique that evaluates abdominal obesity by estimating the thickness of subcutaneous fat. EIT has a fundamental drawback for absolute admittivity imaging because of its lack of reference data for handling the forward modeling errors. To reduce the effect of boundary geometry errors in imaging abdominal fat, we develop a depth-...

The problem of a monopole mounted near the edge of a wedge or a vertex is considered. Three types of solutions-surface patch modeling, moment method/geometrical theory of diffraction (MM/GTD), and MM/eigenfunction-are presented, discussed, and compared with measurements. Results are in the form of input impedance and radiation patterns.

A modified Schwarz-Christoffel transformation (SCT) is used to obtain guidedand radiated-wave characteristics of a singlycurved rectangular patch antenna. The method is to map a straight channel into an arbitrarily-curved channel. This simplifies the problem to that of a planar rectangular patch antenna. Applying conventional SCT to the problem confronts two difficulties: the region under inves...