PCB-MEMS RF Switch: Parametric analysis and design guide lines

2007 ◽  
Author(s):  
M. Weber B. S ◽  
L. C. Kretly
Keyword(s):  
Parametric Analysis ◽  
Rf Switch ◽  
Analysis And Design ◽  
Design Guide ◽  
Guide Lines

Analysis and Design of a Robust RF MEMS Switch

2012 ◽  
Author(s):  
Ibrahim Chamseddine ◽  
Hadi Kasab ◽  
Maya Antoun ◽  
Tawfiq Dahdah ◽  
Mohammed Mirhi ◽  
...  
Keyword(s):  
Failure Modes ◽  
Rf Mems ◽  
Dielectric Breakdown ◽  
Rf Switch ◽  
Switching Speed ◽  
Analysis And Design ◽  
Electrostatically Actuated ◽  
Mems Switch ◽  
Switching Performance ◽  
Contact Adhesion

A MEMS RF switch is expected to undergo 10 billion switching cycles before failure. Until complete physical explanation for these failure modes that include contact adhesion, damping effects, stiction, increases in resistance with time, dielectric breakdown, and electron trapping is fully established, the technology’s numerous advantages cannot be harvested reliably and efficiently. This paper investigates prospective solutions to problems in switch designs by proposing a new design for the switch. We consider the new design from different perspectives: dynamic, electric, fluidic, etc. It is billed to overcome the difficulties and involves the implementation of liquid metal contact electrostatically actuated to ensure the same switching performance, with prolonged life span, and robust switching speed.

ANALYSIS AND DESIGN OF A QUASI-RESONANT FAST ON-LOAD TAP CHANGING REGULATOR

2004 ◽  
Vol 13 (04) ◽  
pp. 877-899 ◽  
Author(s):  
R. ECHAVARRÍA ◽  
V. SÁNCHEZ ◽  
M. PONCE ◽  
M. COTOROGEA ◽  
A. CLAUDIO
Keyword(s):  
Mathematical Model ◽  
High Frequency ◽  
Critical Loads ◽  
Parametric Analysis ◽  
Main Function ◽  
Constant Voltage ◽  
Slow Response ◽  
Power Losses ◽  
Analysis And Design ◽  
Power Stage

The main function of the on-load tap changing (OLTC) regulators consists of maintaining a constant voltage in order to feed critical loads despite the load changes or voltage changes in the ac mains. The traditional regulators are still used nowadays, but they present several disadvantages, like a slow response, which reaches from 100 ms to several seconds. These drawbacks can be overcome if the OLTC regulators would have shorter response time, commuting several times every cycle of the mains. There are two basic topologies for fast OLTC regulators. The first one consists of several taps and uses hard switching. The second one consists of two main switches commuting at high frequency, using soft-switching in order to reduce the power losses. The present topology is of the second type. This paper presents a mathematical model of the power stage of the proposed regulator. The model includes the parasitic resistances and the leakage inductances in order to obtain a better comprehension of the regulator operation. A parametric analysis has been done in order to observe the influence of the parasitic elements in the performance of the main parameters of the topology. The model is verified by experimental results obtained using a 500-W prototype.

Analysis and Design Guide of Active EMI Filter in a Compact Package for Reduction of Common-Mode Conducted Emissions

2015 ◽  
Vol 57 (4) ◽  
pp. 660-671 ◽  
Author(s):  
Dongil Shin ◽  
Sungnam Kim ◽  
Geunseok Jeong ◽  
Jaesu Park ◽  
Joungwook Park ◽  
...  
Keyword(s):  
Common Mode ◽  
Analysis And Design ◽  
Design Guide ◽  
Emi Filter ◽  
Conducted Emissions

scholarly journals Life cycle costing analysis using the mechanistic-empirical pavement design guide for flexible pavements

2021 ◽  
Author(s):  
Omar M. Sharif
Keyword(s):  
Life Cycle ◽  
Economic Cost ◽  
Cost Effective ◽  
Flexible Pavement ◽  
Life Cycle Costing ◽  
Pavement Design ◽  
Analysis And Design ◽  
Design Guide ◽  
National Cooperative ◽  
Costing Analysis

The Mechanistic-Empirical Pavement Design Guide (MEPDG), developed by the American Association of State Highway and Transportation Officials (AASHTO) under the directive of the U.S. National Cooperative Highway Research Program (NCHRP) Project 1-37A, is the latest development in the concept and theories for the analysis and design of new pavements and of overlays for the existing pavements. While MEPDG is waiting for its full-scale implementation and to replace the traditional pavement design methods, it is desirable to make use of the performance prediction capacity of the MEPDG for accurate life-cycle costing analysis. The objective of this study is to review the state of the art and state of the practices for LCC and the new MEPDG methodology for flexible pavement design/preservation, and explore a framework for the integration of LCC into the new MEPDG, which would help the pavement agencies to evaluate the most economic (cost-effective) flexible pavement design for a new roadway section and overlay design for an existing flexible pavement as well as the preservation (maintenance and rehabilitation) time/strategy based on MEPDG methodology.

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