scholarly journals Modal Characteristics Study of CEM-1 Single-Layer Printed Circuit Board Using Experimental Modal Analysis

2012 ◽  
Vol 41 ◽  
pp. 1360-1366 ◽  
Author(s):  
M.A. Anuar ◽  
A.A. Mat Isa ◽  
Z.A.R. Ummi
Keyword(s):  
Modal Analysis ◽  
Printed Circuit Board ◽  
Single Layer ◽  
Experimental Modal Analysis ◽  
Circuit Board ◽  
Printed Circuit ◽  
Modal Characteristics

Ambient Response Modal Analysis on a CEM-1 Single-Layer Printed Circuit Board

2013 ◽  
Vol 393 ◽  
pp. 683-687
Author(s):  
M. Azhan Anuar ◽  
A.A. Mat Isa ◽  
A.R. Zamri ◽  
M.F.M. Said
Keyword(s):  
Domain Decomposition ◽  
Modal Analysis ◽  
Frequency Domain ◽  
Printed Circuit Boards ◽  
Printed Circuit Board ◽  
Single Layer ◽  
Circuit Board ◽  
Valuable Insight ◽  
Printed Circuit ◽  
Frequency Domain Decomposition

Since the level of vibration always depends on the natural frequencies of the system, it is important to know the modal parameters of such system to control failure and provide prevention actions. The demand for structurally reliable Printed Circuit Boards (PCB) has increased as more functions are required from electronic products along with less weight and smaller size. This imposes certain limitations and critical requirements. In this paper, investigation on the dynamic characteristics of CEM-1 Single-layer PCB using Operational Modal Analysis (OMA, or often called Output-Only or Ambient Modal analysis), is presented. The Frequency Domain Decomposition (FDD) and Enhanced Frequency Domain Decomposition (EFDD) techniques are applied on the PCB with free-free end condition. Comparison of results between both techniques and also with the result from Experimental Modal Analysis (EMA), will be shown. The understanding on dynamic behaviour of this structure provides valuable insight into the nature of the response and remarkable enhancement of its model, strength and vibration.

scholarly journals POSIBILITY OF CREATING A PRINTED SINGLE-LAYER TRANSREFLECTOR WITH INCREASED PHASE EFFICIENCY

2019 ◽  
pp. 139-145
Author(s):  
A. N. Mikhailov
Keyword(s):  
Printed Circuit Board ◽  
Single Layer ◽  
Circuit Board ◽  
Horizontal Polarization ◽  
Radiation Characteristics ◽  
Printed Circuit ◽  
W Band ◽  
New Type ◽  
Reflectarray Antenna ◽  
Geometrical Dimensions

A new type of single‑layer transrefleсtor structure based on microstrip reflective antenna array is described. The developed  device is a single‑layer printed circuit board on one side of which a system of printed reflectors is located, and on the other is  a polarization structure consisting of parallel metal conductors, in contrast to a microstrip reflectarray antenna. The shape and  geometrical dimensions of printed reflectors arranged in a rectangular or hexagonal (triangular) pattern are chosen in such a way  that they transform a spherical front of an incident vertically polarized electromagnetic wave into a flat front of reflected wave. In  the case of irradiation of the developed transreflector with a horizontal polarization wave, the printed structure makes minimal  electromagnetic energy loss during its passage. The results of characteristics modeling (including phase curves) of an element  of the reflective lattice in the W‑band for different angles of incidence of the wave on the planar structure under study are given.  Based on the results obtained, the sizes of the reflective elements of the transreflector, which provide for the correction of the  incident wave with the necessary phase discrete, are determined and an electrodynamic model of the transreflector antenna is  built. The simulation of the main radiation characteristics of the antenna with the developed single‑layer transreflector was carried  out.

scholarly journals 2D Gain Enhancement Based on Single-Layer SIW Corrugated Technique with Slot Array Feeder

2018 ◽  
Vol 2018 ◽  
pp. 1-6
Author(s):  
Mingtuan Lin ◽  
Chenglong Lin
Keyword(s):  
Reflection Coefficient ◽  
Printed Circuit Board ◽  
Single Layer ◽  
High Gain ◽  
Circuit Board ◽  
Design Complexity ◽  
Printed Circuit ◽  
Gain Enhancement ◽  
High Gain Antenna ◽  
The Common

Novel slot-array-based SIW corrugated technique is demonstrated to achieve 2D gain enhancement, namely, sharpening the beamwidths in both E-plane and H-plane. Compared to other metallic corrugated methods to realize 2D gain enhancement, the proposed design, with SIW grooves to reduce the beamwidth in E-plane and slot array to increase the directivity in H-plane, has a lower profile, weight, and design complexity, which can be easily fabricated with the common printed circuit board (PCB) technique. A prototype is designed and fabricated, with measurement presenting a low reflection coefficient less than −10 dB from 26.4 GHz to 28.2 GHz and an enhanced gain up to 18 dB. Overall, our proposed technique will be beneficial for the design of high-gain antenna in 5G wireless terminals.

scholarly journals Novel modular pressure and flow rate balanced microfluidic serial dilution networks on printed circuit boards: Designs, Simulations and Fabrication

2018 ◽  
Author(s):  
Nikolaos Vasilakis ◽  
Konstantinos I. Papadimitriou ◽  
Hywel Morgan ◽  
Themistoklis Prodromakis
Keyword(s):  
Printed Circuit Boards ◽  
Printed Circuit Board ◽  
Single Layer ◽  
Unit Cell ◽  
Serial Dilution ◽  
Circuit Board ◽  
Driving Mechanism ◽  
Buffer Solution ◽  
System Architectures ◽  
Printed Circuit

AbstractFast, efficient and more importantly accurate serial dilution is a requirement for many chemical and biological microfluidic-based applications. Over the last decade, a large number of microfluidic devices has been proposed, each demonstrating either a different type of dilution technique or complex system architectures based on various flow source combinations. In this work, a novel serial dilution architecture is demonstrated, implemented on a commercially fabricated printed circuit board (PCB). The proposed single layer, stepwise serial diluter comprises an optimised microfluidic network, where identical dilution ratio per stage can be ensured, either by applying equal pressure or equal flow rates at both inlets. The advantages of the proposed serial diluter are twofold. Firstly, it is structured as a modular unit cell, simplifying the required fluid driving mechanism to a single source for both sample and buffer solution. Thus, this unit cell can be seen as a fundamental microfluidic building block, which can form multistage serial dilution cascades, once combined appropriately with itself or other similar unit cells. Secondly, the serial diluter has been fabricated entirely using commercial PCB technologies, allowing the device to be interfaced with standard electronic components, if more complex miniature point-of-care (PoC) systems are desired, where the small footprint and accuracy of the device is of paramount importance.

Modal Analysis and Structure Optimization of a Printed Circuit Board NC Drilling Machine

2013 ◽  
Vol 385-386 ◽  
pp. 320-323
Author(s):  
Jia Wei Zhu ◽  
Shi De Xiao ◽  
Jian Feng ◽  
Xiang Yin Meng ◽  
Ming Ming Jiang
Keyword(s):  
Machine Tool ◽  
Modal Analysis ◽  
Dynamic Property ◽  
Primary Structure ◽  
Printed Circuit Board ◽  
Structure Optimization ◽  
Influential Factors ◽  
Circuit Board ◽  
Drilling Machine ◽  
Printed Circuit

The solid modeling of one type of printed circuit board NC drilling machine is built by Pro/Engineer, and ANSYS is applied for modal analysis. In this paper, the key influential factors of the structure of the drilling machine are found out, the structure is improved and two prioritization schemes are proposed. After analyzing the primary structure and the two optimized structures of the machine tool bed and then comparing the analysis results, the optimal scheme is proposed. The results show that the optimization improves the dynamic property and the machining precision of the drilling machine.

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