A Wideband Electromagnetic Energy Harvester for Random Vibration Sources

2009 ◽  
Vol 74 ◽  
pp. 165-168 ◽  
Author(s):  
Bin Yang ◽  
Cheng Kuo Lee
Keyword(s):  
Printed Circuit Board ◽  
Energy Harvester ◽  
Wide Band ◽  
Longitudinal Direction ◽  
Circuit Board ◽  
Ambient Vibration ◽  
Flat Band ◽  
Free Standing ◽  
Band Frequency ◽  
Acrylic Plate

A novel non-resonant energy harveser with wide band frequency is proposed for collecting energy from ambient vibration at low frequency. A free-standing magnet is packaged inside a sealed hole which is created by stacking 5 pieces of printed circuit board (PCB) substrates with multi-layer copper coils made on double-sides. When the energy harvester is shook from 10 to 300 Hz at 1.9g acceleration along longitudinal direction of hole, a 65 Hz flat-band-like output voltage of 4.5 mV at the case of only one side with drilled air holes on acrylic plate is generated within 35 to 100 Hz. The output power from the coils is measured as 0.1µW under matched loading resistance of 50 Ω within this flat band range under 1.9 g ambient vibration.

In-Plane Electromagnetic Generator Fabricated on Printed Circuit Board Technology

2013 ◽  
Vol 479-480 ◽  
pp. 524-529
Author(s):  
C.T. Pan ◽  
F.T. Hsu ◽  
C.C. Nien ◽  
Z.H. Liu ◽  
Y.J. Chen ◽  
...  
Keyword(s):  
Printed Circuit Board ◽  
Energy Harvester ◽  
Cost Effective ◽  
Circuit Board ◽  
Outer Diameter ◽  
Magnetic Element ◽  
Induced Voltage ◽  
Element Analysis ◽  
Printed Circuit ◽  
Electromagnetic Generator

Small and efficient energy harvesters, as a renewable power supply, draw lots of attention in the last few years. This paper presents a planar rotary electromagnetic generator with copper coils fabricated by using printed circuit board (PCB) as inductance and Nd-Fe-B magnets as magnetic element. Coils are fabricated on PCB, which is presumably cost-effective and promising methods. 28-pole Nd-Fe-B magnets with outer diameter of 50 mm and thickness of 2 mm was sintered and magnetized, which can provide magnetic field of 1.44 Tesla. This harvester consists of planar multilayer with multi-pole coils and multi-pole permanent magnet, and the volume of this harvester is about 50x50x2.5 mm3. Finite element analysis is used to design energy harvesting system, and simulation model of the energy harvester is established. In order to verify the simulation, experiment data are compared with simulation result. The PCB energy harvester prototype can generate induced voltage 0.61 V and 13.29mW output power at rotary speed of 4,000 rpm.

scholarly journals A new and improved electric fish finder with resources for printed circuit board fabrication

2019 ◽  
Vol 17 (4) ◽  
Author(s):  
Michael A. Haag ◽  
Jeffrey C. Lambert ◽  
Joseph C. Waddell ◽  
William G.R. Crampton
Keyword(s):  
Electric Fish ◽  
Printed Circuit Boards ◽  
Printed Circuit Board ◽  
Electric Organ ◽  
Wide Band ◽  
Circuit Board ◽  
Circuit Boards ◽  
Water Conductivity ◽  
Printed Circuit ◽  
Electric Organ Discharges

ABSTRACT We describe the circuit design, construction, and operation of a field-portable electric fish finder (an AC-coupled wide-band differential bio-amplifier with loudspeaker output). This device permits detection and monitoring of the electric organ discharges generated by neotropical gymnotiform fishes (as well as the mormyroid fishes of tropical Africa). Our design is modified from earlier versions to optimize detection performance and stability over a wider range of ambient water conductivity, including under conditions of extremely low conductivity (< ca. 10 μScm-1). Our new electric fish finder design also incorporates complete waterproofing and longer battery autonomy. We provide Gerber and Eagle files made with the electronic design automation software ‘Autodesk Eagle’ to allow researchers to order printed circuit boards directly from commercial manufacturers.

scholarly journals A Magneto-Electric Dipole Antenna Array for Millimeter Wave Applications

2020 ◽  
Vol 10 (4) ◽  
pp. 6057-6061
Author(s):  
D. T. T. My ◽  
H. N. B. Phuong ◽  
T. T. Huong ◽  
B. T. M. Tu
Keyword(s):  
Millimeter Wave ◽  
Frequency Band ◽  
Printed Circuit Board ◽  
Impedance Matching ◽  
Ground Plane ◽  
Wide Band ◽  
Side Lobe ◽  
Dipole Antenna ◽  
Circuit Board ◽  
Single Element

In this paper, a low-profile broadband antenna is proposed for future 5G millimeter-wave cellular wireless networks. The proposed antenna is a modified Magneto-Electric (ME) dipole, which consists of four metallic plates, grounded vias, an aperture fed, a ground plane, and a microstrip line feed. The antennas are built on RT/Duroid 5880 substrates and have been realized by the printed circuit board technique. A single-element with an overall of 10×10×1.04mm3 (~1.26λo×1.26λo×0.13λo at 38GHz) exhibits an impedance matching of 27.9% (32.2-42.8GHz) for |S11|<–10dB and a realized gain up to 7.5dBi over the frequency band. The usefulness of these antennas as beamforming radiators is demonstrated by a 1×4 element linear array. Also, a wide-band excitation is applied for the linear ME dipole array to realize a broadband array. The simulated results proved the proposed array can operate in a frequency band spreading from 31.4GHz to 42.1GHz with a gain of 12.5dBi and a side-lobe of -13dB

scholarly journals Design and Implementation of a Novel Microstrip Filter

2019 ◽  
Vol 8 (2S5) ◽  
pp. 43-46
Keyword(s):  
Transmission Line ◽  
Impulse Response ◽  
Printed Circuit Board ◽  
Filter Design ◽  
Finite Impulse Response ◽  
Circuit Board ◽  
Infinite Impulse Response ◽  
Pass Band ◽  
Electrical Transmission ◽  
Band Frequency

Microwave filters are circuits which perform signal processing functions, particularly to eliminate unwanted frequency components from the signal, to enhance wanted ones, or both. Electronic filters can be passive or active(depends on components used) Analog or digital(depends on input signal) High-pass, Low-pass, Band-pass, Band-stop or all other pass (depends on frequency) Infinite impulse response (IIR type) or Finite impulse response (FIR type) (Depends on response) Microstrip is a type of electrical transmission line which can be fabricated using printed circuit board technology, and is used to convey microwave frequency signals. Microwave components such as antennas, couplers, filters, power dividers etc can be formed using microstrip line. This paper aims on filter design, using microstrip transmission line, with a Non-Periodic technique especially using Defected Microstrip Structure to be operated in the C – Band frequency.

Optimization of Resonator Design for Vibration-Based Electromagnetic Energy Harvester

2013 ◽  
Vol 471 ◽  
pp. 355-360
Author(s):  
Tony Ow Koon Seong ◽  
Hanim Salleh ◽  
Anis Nurashikin
Keyword(s):  
Structural Analysis ◽  
Stress Analysis ◽  
Energy Harvester ◽  
Electromagnetic Energy ◽  
Maximum Power ◽  
Ambient Vibration ◽  
Frequency Range ◽  
Band Frequency ◽  
Minimum Power ◽  
Resonator Design

This paper presents an optimization on the resonator, which is one of the main components of electromagnetic energy harvester, using static structural analysis, stress analysis and modal analysis. The electromagnetic energy harvester is a vibration-based energy harvesting technology which has emerged as a solution for powering autonomous sensor nodes to increase their life span. Electromagnetic energy harvester acts as a transducer that converts ambient vibration energy to electrical power. An initial design of the resonator is developed and analyzed using ANSYS software. Static structural analysis and stress analysis have been performed to analyze different resonator designs to produce an optimum resonator model. Maximum static deflection under gravitation force was found to be 104.12 μm. Resonance frequency of the resonator was found to be 261.56Hz by using modal analyses. The selected resonator design was further modified to cater for wide-band frequency application as well as to have better performance. Four resonators with different beam lengths were combined in a model in order to operate at a wider frequency range. Five models were generated and the smallest frequency range is from 272 Hz to 299 Hz by model 5110_5410. The maximum power and minimum power that can be generated for this model is 135 μW and 93.9 μW respectively. The model 3910_4210 which has the highest frequency range generated a maximum power of 437 μW and minimum power of 270 μW at a frequency range of 422 Hz to 466 Hz.

scholarly journals Fabrication and Characterization of the Li-Doped ZnO Thin Films Piezoelectric Energy Harvester with Multi-Resonant Frequencies

Micromachines ◽  
2019 ◽  
Vol 10 (3) ◽  
pp. 212 ◽  
Author(s):  
Xiaofeng Zhao ◽  
Sen Li ◽  
Chunpeng Ai ◽  
Hongmei Liu ◽  
Dianzhong Wen
Keyword(s):  
Thin Films ◽  
Printed Circuit Board ◽  
Energy Harvester ◽  
Load Resistance ◽  
Circuit Board ◽  
Process Conditions ◽  
Resonant Frequencies ◽  
Piezoelectric Energy ◽  
Piezoelectric Structure ◽  
Doped Zno

A novel piezoelectric energy harvester with multi-resonant frequencies based on Li-doped ZnO (LZO) thin films is proposed in this paper, consisting of an elastic element with three (or more) different length cantilever beam arrays and a piezoelectric structure (Al/Li-doped ZnO/Pt/Ti). The LZO thin films of piezoelectric structure were prepared on Pt/Ti/SiO2/Si by using a radio frequency (RF) magnetron sputtering method under certain process conditions. When the LZO thin films were deposited with an LZO target concentration of 5 wt%, the piezoelectric coefficient d33 was 9.86 pm/V. Based on this, the energy harvester chips were fabricated on a <100> silicon substrate using micro-electromechanical systems (MEMS) technology, and its performance can be measured by fixing it to a printed circuit board (PCB) test substrate. The experimental results show that, when exerting an external vibration acceleration of 2.2 g and a vibration frequency of 999 Hz, the energy harvester can achieve a big load voltage of 1.02 V at a load resistance of 600 kΩ, and a high load power of 2.3 µW at a load resistance of 200 kΩ.

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