In this study, the performance of an electromagnetic vibration energy harvester (EM-VEH) based on micro-electro-mechanical systems 3D coils was presented theoretically and experimentally. The VEH employs two E-shape iron cores inserted into to reduce magnetic leakage improve output power. structure, planar spring stiffness attraction between core magnet are nonlinear, which can broad bandwidth....

We propose a new configuration for the height reduction. The radiation element is modified for lower quality factor and lower height. The 2x2-element sub-array is analyzed for wider reflection bandwidth. The height is reduced by 1.5mm but the reflection bandwidth becomes 1.9 % narrower in the 60GHz-band model.

Mel frequency cepstral coefficients (MFCC) are the most widely used speech features in automatic speech recognition systems, primarily because the coefficients fit well with the assumptions used in hidden Markov models and because of the superior noise robustness of MFCC over alternative feature sets such as linear prediction-based coefficients. The authors have recently introduced human factor...

In this paper a printed dipole antenna and three slot antennas are designed to operate at 10 GHz for use in radar systems. A parametric study of each antenna and comparison between their radiation properties including return loss, bandwidth, directivity, efficiency and radiation patterns for 6element linear array are introduced. Microstrip slot antennas show wider bandwidth, less coupling and s...

Inductï ely and capacitï ely end-coupled quarter-wä elength-resonator bandpass CPW filters are introduced. For a gï en bandwidth and passband shape, the new filters ha ̈e a smaller size, wider upper stop band and looser coupling between resonators than end-coupled half-wa ̈elength-resonator CPW filters. The design of two filters with 5% and 50% bandwidth at 10 GHz is presented. Q 1997 John Wiley ...

Abstract ⎯ In this paper a printed dipole antenna and three slot antennas are designed to operate at 10 GHz for use in radar systems. A parametric study of each antenna and comparison between their radiation properties including return loss, bandwidth, directivity, efficiency and radiation patterns for 6-element linear array are introduced. Slot antennas show wider bandwidth, less coupling and ...

A micro strip-fed printed bow-tie antenna is presented inorder to achieve wide bandwidth, high gain, and size reduction. A comparisonbetween the bow-tie and the quasi-Yagi (dipole and director)antennas shows that the bow-tie antenna has a wider bandwidth, highergain, lower front-to-back ratio, lower crosspolarization level, andsmaller size. Two-element arrays are designed and their characterist...

Ring-based hierarchical networks are interesting alternatives to popular direct networks such as 2D meshes or tori. They allow for simple router designs, wider communications paths, and faster networks than their direct network counterparts. However, they have a constant bisection bandwidth, regardless of system size. In this paper, we present the results of a simulation study to determine how ...

Background The Current Landscape Recent generations of wireless systems have increased in flexibility and complexity. Techniques including frequency agility, multi-channel devices, and software-defined radios have all served to address the growing need for more wireless functionality, particularly in mobile devices. However, this has aggravated the long-existing problem in which the RF bandwidt...