PRINTED QUASI-YAGI ANTENNAS WITH CENTER-END-FED DIPOLE DRIVER

2018 ◽  
pp. 19-23
Author(s):  
D. A. Bukhtiyarov ◽  
A. P. Gorbachev
Keyword(s):  
Printed Circuit Board ◽  
Phased Arrays ◽  
Dielectric Material ◽  
Circuit Board ◽  
Power Divider ◽  
The Novel ◽  
Printed Circuit ◽  
Radio Systems ◽  
Hybrid Ring

The novel realization of printed Yagi-Uda antenna is presented in this paper. Such the aerials are widely used in the modern telecommunication and radiolocation systems. The described method uses the nontraditional center-end-fed in-phase excitation through the hybrid ring two-way power divider. This divider behaves acceptable behavior, when all the lengths and clearances between printed conductors are optimized for Russian dielectric material FAF-4. This material is the successful discovery, when the aerial is excited through the subminiature version A connector that satisfies double-sided printed circuit board realization. The simulation-derived results indicate that the proposed aerial is the fan-beam radiator. This radiator is a good candidate for the use in the novel printed planar equidistant phased arrays for various radio systems including radiolocation, radio-finder arrangements, navigation an so on.

scholarly journals Design Analysis of a Mobile-Based Gait Analyzer

2019 ◽  
Vol 3 (3) ◽  
Author(s):  
Adedotun Oluwakanyinsola Owojori ◽  
Ibukunoluwa A. Adebanjo ◽  
Samson A. Oyetunji
Keyword(s):  
Hardware Implementation ◽  
Printed Circuit Board ◽  
Dielectric Material ◽  
Circuit Board ◽  
Printed Circuit ◽  
Uniform Distance ◽  
Pressure Mapping ◽  
Short Period ◽  
Mapping Technology ◽  
Processing Circuit

Considering a system capable of identifying abnormalities in people's walking conditions in real-time, simply by studying his/her walking profile over a short period of time is a phenomenal breakthrough in the field of biotechnology. Such abnormalities could be as a result of injury, old age, or disease termed gait which could be analyzed using the pressure mapping technology. Pressure points in the feet of an injured person as he/she walks is analyzed by sets of sensors (capacitive sensors) carefully design with a rectangular 5.1cm by 2cm parallel aluminium plate and placed on developed footwear with a uniform distance of 1cm across the dielectric material. The output of the pre-processing stage gives varying values which are calibrated and sent to the microcontroller. All placed on a portable sized Printed Circuit Board (PCB) making it moveable from one place to another (that is, mobile), is the pre-processing circuit that converts measured or evaluated result to the transmittable signal through a Mobile Communication System which can be received on a Personal Computer (PC) in form of a periodic chat and/ or report. The result of the analysis is shown both in simulation and hardware implementation of the system

Macro and Micro Thermal Model of an Elevated Temperature Dielectric Breakdown in Printed Circuit Boards

1996 ◽  
Author(s):  
R. Stutzman ◽  
S. Sathe ◽  
B. Sammakia
Keyword(s):  
Thermal Model ◽  
Printed Circuit Boards ◽  
Printed Circuit Board ◽  
Dielectric Breakdown ◽  
Dielectric Material ◽  
High Current Density ◽  
Thermal Modeling ◽  
Circuit Board ◽  
Printed Circuit ◽  
Defect Site

Abstract A computational macro and micro thermal model of a printed circuit board dielectric breakdown due to local and global heating of the laminate material is presented in this paper. On a macro level, under certain conditions, the circuit board temperature can approach the glass transition temperature (Tg) due to electronic surface mounted components dissipating heat to the board surface. Under these conditions interfacial micro cracks or dielectric inhomogeneities can be aggravated to an extent where localized voltage breakdown can occur across copper planes within the board. The micro thermal modeling results demonstrate that even under relatively high defect resistance levels the localized temperature at the defect site can greatly exceed the Tg of the dielectric material resulting in carbonization and eventually catastrophic failure. A temperature profile at the defect site clearly shows the spike in the local temperature due to the low thermal conductivity properties of the dielectric material and the localized high current density. The thermal modeling was performed using Flotherm (trademark of Flomerics Limited) code.

scholarly journals Development and characterisation of acoustofluidic devices using detachable electrodes made from PCB

Lab on a Chip ◽  
2020 ◽  
Vol 20 (10) ◽  
pp. 1807-1814 ◽  
Author(s):  
Roman Mikhaylov ◽  
Fangda Wu ◽  
Hanlin Wang ◽  
Aled Clayton ◽  
Chao Sun ◽  
...  
Keyword(s):  
Printed Circuit Board ◽  
Device Fabrication ◽  
Circuit Board ◽  
The Novel ◽  
Fabrication Technique ◽  
Printed Circuit ◽  
Saw Devices ◽  
Interdigital Electrodes

We demonstrate a novel SAW device fabrication technique by mechanically clamping interdigital electrodes (IDEs) on the printed circuit board (PCB) to a LiNbO3 wafer. The novel PCB-SAW device is capable of performing all the functions of standard SAW devices.

scholarly journals 2D electromagnetic actuated quasi-static FPCB based micromirror for laser marking/engraving system

2021 ◽  
Author(s):  
Devanshu Kakkar
Keyword(s):  
Printed Circuit Board ◽  
Low Cost ◽  
Circuit Board ◽  
The Novel ◽  
Static Mode ◽  
Laser Marking ◽  
Suitable Candidate ◽  
Printed Circuit ◽  
Flexible Printed Circuit ◽  
Thesis Work

This thesis presents the design and development of quasi-static 2-dimensional Flexible Printed Circuit Board (FPCB) based micromirror for portable laser marking/ engraving system. It focuses on the modelling and prototyping of the novel 2-dimensional electromagnetic actuated micromirror which can be used in place of two 1-dimensional micromirrors having the benefits of lower footprint in size of the scanner and efficient alignment with the incident laser beam. This 2-dimensional micromirror can be used in portable low power laser marking/ engraving system ideally designed for consumer applications like printing name cards, engraving jewellery etc. The problem of drifting/ creep associated with quasi-static mode of FPCB based micromirror actuators is analyzed and Zero method is proposed to minimize the drifting issue which is proven experimentally in the thesis. From this thesis work, it is evident that the developed 2-dimensional, low-cost, quasi-static FPCB based micromirror would be a suitable candidate for replacement of the expensive conventional MEMS bonded mirrors in the market.

scholarly journals 2D electromagnetic actuated quasi-static FPCB based micromirror for laser marking/engraving system

2021 ◽  
Author(s):  
Devanshu Kakkar
Keyword(s):  
Printed Circuit Board ◽  
Low Cost ◽  
Circuit Board ◽  
The Novel ◽  
Static Mode ◽  
Laser Marking ◽  
Suitable Candidate ◽  
Printed Circuit ◽  
Flexible Printed Circuit ◽  
Thesis Work

This thesis presents the design and development of quasi-static 2-dimensional Flexible Printed Circuit Board (FPCB) based micromirror for portable laser marking/ engraving system. It focuses on the modelling and prototyping of the novel 2-dimensional electromagnetic actuated micromirror which can be used in place of two 1-dimensional micromirrors having the benefits of lower footprint in size of the scanner and efficient alignment with the incident laser beam. This 2-dimensional micromirror can be used in portable low power laser marking/ engraving system ideally designed for consumer applications like printing name cards, engraving jewellery etc. The problem of drifting/ creep associated with quasi-static mode of FPCB based micromirror actuators is analyzed and Zero method is proposed to minimize the drifting issue which is proven experimentally in the thesis. From this thesis work, it is evident that the developed 2-dimensional, low-cost, quasi-static FPCB based micromirror would be a suitable candidate for replacement of the expensive conventional MEMS bonded mirrors in the market.

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