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Pixel-Level Vibration Source Detection Using Undersampled Video Sequences
2018 Edition, October 1, 2018 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This study proposes a concept of vision-based vibration source localization that can extract objects vibrating at hundreds of Hz with pixel-level accuracy using images captured at an undersampled frame rate that is much lower than the vibration frequency. We discuss how to determine the...

Circular Airy beam based on bandpass filter
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

A new type of circular Airy beams is demonstrated by using a bandpass filter, in order to enhance the field intensity at the focal point of light beam, based on the angular spectrum representation and the ray optics picture. The specific ring and the key spatial frequency corresponding to...

New Transparent Bandpass Filter Using Aluminum Thin Film Micromesh Structure
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

In this study, we present the new transparent coplanar waveguide (CPW) bandpass filter using aluminum (Al) thin film micromesh structure. The filter is prepared by the semiconductor process of dc sputtering and standard lift-off technology. In order to achieve the high-performance...

Compact Planar Balanced Crossover With Bandpass Response
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

A planar balanced crossover with bandpass response is proposed. This crossover consists of a ring resonator and four half-wavelength resonators. It acts as a third-order filter between two diagonal ports under differential-mode (DM) excitation and exhibits isolation between two adjacent...

Multilongitudinal Mode Fiber Laser Sensor Demodulation Based on Bandpass Sampling
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This paper proposes a novel demodulation system for multilongitudinal mode (MLM) fiber laser sensors via bandpass sampling receivers. The MLM fiber laser sensor generates a wideband multitone signal wherein any tone can be used as a sensing signal, so the wideband signal can be...

Compact Bandpass-to-Bandstop Reconfigurable Filter With Wide Tuning Range
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

A compact reconfigurable bandpass-to-bandstop filter with wide tuning range is presented. The bandpass-to-bandstop transformation is achieved by a p-i-n diode. In the bandstop mode, the two-pole bandstop response is obtained by introducing the inductive coupling between the two...

Guided wave retrieval from temporally undersampled data
2017 Edition, September 1, 2017 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

The acquisition of ultrasonic guided waves for full wavefield nondestructive evaluation (NDE) applications is often a time-consuming procedure. Moreover, the amount of data to be stored over time can be enormous. Consequently, to improve storage efficiency and reduce the acquisition time, it...

Miniaturized-Element Bandpass FSS by Loading Capacitive Structures
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

A bandpass FSS element loaded with capacitive structures is proposed to miniaturize FSS unit cell size. In the FSS design, the capaci-tive structure, implemented by convoluted slot grids (CSGs), is intro-duced to increase the equivalent capacitance of the bandpass FSS, thus leading to...

Substrate Integrated Waveguide Dual-Band and Wide-Stopband Bandpass Filters
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

In this letter, a new coupling structure implemented on a single-layer substrate and its application to design substrate integrated waveguide (SIW) dual-band and wide-stopband bandpass filters are presented. The TE₁₀₁ and the TE₁₀₂ modes of SIW cavity are used to design the proposed filters....

Guided wave retrieval from temporally undersampled data
2017 Edition, September 1, 2017 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Within the realm of structural health monitoring (SHM), employing guided waves as an efficacious means of inspecting structures for potential defects has been steadily gaining ground, owing to the numerous advantages it provides, including accessibility and low cost of transducers as well as...

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