A new model to calculate the coupling coefficient for more accurate filter design and further development of narrowband-filter performance

2005 ◽  
Vol 47 (2) ◽  
pp. 180-185 ◽  
Author(s):  
Z. M. Hejazi ◽  
Z. Jiang
Keyword(s):  
Coupling Coefficient ◽  
Filter Design ◽  
New Model ◽  
Filter Performance ◽  
Further Development ◽  
Narrowband Filter

MODELING OF INDUCED VOLTAGE OF SILICON DIOXIDE FIBER COUPLING

2009 ◽  
Vol 18 (03) ◽  
pp. 481-488 ◽  
Author(s):  
NOR FARIDAH HANIM ◽  
SAKTIOTO ◽  
JALIL ALI ◽  
ROSLY ABDUL RAHMAN
Keyword(s):  
Refractive Index ◽  
Silicon Dioxide ◽  
Breakdown Voltage ◽  
Coupling Coefficient ◽  
Empirical Equation ◽  
Induced Voltage ◽  
New Model ◽  
Fiber Coupling ◽  
Fiber Coupler

This paper describes a new model for the breakdown voltage of SiO 2 fiber coupler using the Pockel effect and empirical equation. The model is evaluated by using the coupling coefficient and the changes in the refractive index. We found that the breakdown voltage is in the order of 102 volt corresponding to coupling coefficient by the order of mm-1. Increasing the value of coupling coefficient between the electrodes leads to a reduction in the breakdown voltage.

Microwave Filter Design Optimized for Ceramic Multilayer Technique

2016 ◽  
Vol 2016 (CICMT) ◽  
pp. 000199-000202
Author(s):  
Peter Uhlig ◽  
Juergen Kassner ◽  
Carsten Guenner ◽  
Elke Noack
Keyword(s):  
Filter Design ◽  
Three Dimensional ◽  
Microwave Filters ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Millimetre Wave ◽  
Filter Performance ◽  
Filter Synthesis ◽  
Microwave Engineering ◽  
Manufacturing Tolerances

Abstract Low Temperature Co-fired Ceramic (LTCC) is a proven packaging technology for microwave and millimetre-wave applications. Advanced low-loss material systems and improved manufacturing technology facilitate economic and highly reliable packaging solutions for automotive, telecom, medical and security applications. One of the virtues of LTCC is the option to integrate all kinds of components into the multilayer. Embedded passives include resistors, capacitors and inductors. Moving matching networks and filters into inner layers is further increasing density of integration. Microwave filters in LTCC can be used as an integral part of a larger package but also as single components mounted as drop-in or SMT. Ceramic multilayer technology allows for new filter concepts with three-dimensional routing and integration. Tolerances in material properties and manufacturing are challenges to be met with the design and production of microwave filters. Tape thickness, permittivity, shrinkage, registration of conductor pattern to via position, conductor width and thickness are some of the parameters that influence filter performance and reproducibility. This paper shall compare two different concepts for a 20 GHz band pass filter regarding their sensitivity to manufacturing tolerances. An optimized filter design shows improved robustness against manufacturing tolerances. This concept particularly reduces the sensitivity to registration tolerances of conductors and ground vias. A filter synthesis and simulation which takes into account systematic and random manufacturing effects takes out some of the guesswork of filter design and fabrication. It will also reduce the trial and error loops traditionally involved with this part of microwave engineering.

scholarly journals Facile Functionalization via Plasma-Enhanced Chemical Vapor Deposition for the Effective Filtration of Oily Aerosol

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1490 ◽  
Author(s):  
Sanghyun Roh ◽  
Sungmin Kim ◽  
Jooyoun Kim
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Filter Design ◽  
Chemical Vapor ◽  
Surface Modifications ◽  
Solid Particles ◽  
Oxygen Species ◽  
Plasma Process ◽  
Filter Performance ◽  
Filtration Performance

With the growing concern about the health impacts associated with airborne particles, there is a pressing need to design an effective filter device. The objective of this study is to investigate the effect of plasma-based surface modifications on static charges of electrospun filter media and their resulting filtration performance. Polystyrene (PS) electrospun web (ES) had inherent static charges of ~3.7 kV due to its electric field-driven process, displaying effective filtration performance. When oxygen species were created on the surface by the oxygen plasma process, static charges of electret media decreased, deteriorating the filter performance. When the web surface was fluorinated by the plasma-enhanced chemical vapor deposition (PECVD), the filtration efficiency against oily aerosol significantly increased due to the combined effect of decreased wettability and strong static charges (~−3.9 kV). Solid particles on the charged media formed dendrites as particles were attracted to other layers of particles, building up a pressure drop. The PECVD process is suggested as a facile functionalization method for effective filter design, particularly for capturing oily aerosol.

P.4.e.002 The further development of a new model of GAD: no effect of 7.5% CO2 on HPA axis activation in healthy volunteers

2007 ◽  
Vol 17 ◽  
pp. S521
Author(s):  
J.E. Bailey ◽  
S.M. Phillips ◽  
A. Papadopoulos ◽  
A. Diaper ◽  
A. Rich ◽  
...  
Keyword(s):  
Healthy Volunteers ◽  
Hpa Axis ◽  
New Model ◽  
Further Development

scholarly journals CRISIS MANAGEMENT AS A NEW MANAGEMENT PARADIGM

2010 ◽  
pp. 66-79
Author(s):  
P. V. Ushanov
Keyword(s):  
Crisis Management ◽  
Living Organism ◽  
New Model ◽  
Further Development ◽  
Model Subject

The article discusses differences and interrelations of strategic and crisis management. Ways for further development of crisis management at the intersection of economics, psychology, physiology, law, management and other disciplines are being proposed. The conclusion is made that crisis management is a new management paradigm. The model “subject to management – mechanic system” gave place to the model “subject to management – living organism”. The new model in the frame of crisis management allows studying subject to management’s adaptation to changes as an attribute feature of any living organism.

Implementation of the Finite Impulse Response (FIR) Filter on the DSK TMS320C6713 Transceiver Using Windowing Techniques

2018 ◽  
Vol 6 (1) ◽  
pp. 1-8
Author(s):  
Adella Acqha Vico Addina
Keyword(s):  
Filter Design ◽  
Finite Impulse Response ◽  
Bandpass Filters ◽  
Fir Filter ◽  
Test Results ◽  
Rectangular Window ◽  
Filter Performance ◽  
Highpass Filter ◽  
Low Pass ◽  
High Pass

In this study, implementing the FIR filter with the Blackman window and Rectangular window methods with the types of low pass, highpass, and bandpass filters using 2 DSK TMS320C6713 boards as sender (Tx) and receiver (Rx) using the code composer studio (CCS) V software program. .3.1, which will then be displayed on Matlab to observe the output results. From the test results, data will be obtained which are then analyzed to determine the filter performance of the design results and the real implementation results using the DSK TMS320C6713. The results showed that the design of the low pass, high pass and bandpass filters was in accordance with the desired specifications, although in the highpass filter design, the filter results were still incomplete.

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