scholarly journals A Measurement of Non-Coaxial RF Devices with Improved TRL Calibration Algorithm

2018 ◽  
Vol 173 ◽  
pp. 01005
Author(s):  
Chen Shouhong ◽  
Wang Zhuang ◽  
Ma Jun ◽  
Hou Xingna
Keyword(s):  
Performance Test ◽  
Design System ◽  
Microwave Devices ◽  
Test Fixture ◽  
The Real ◽  
S Parameters ◽  
Final Design ◽  
Calibration Algorithm ◽  
Rf Devices ◽  
Rf Microwave

In order to test the S-parameters of non-coaxial RF (Radio Frequency) devices accurately, using, ADS (Advanced Design System) to simulate and design a set of fixture and calibration pieces for noncoaxial, RF device performance test, and the calibration pieces is used to calibrate the test fixture, remove, the error introduced by the fixture, and obtain the real S parameters of non-coaxial RF microwave devices.,Based on the study of various parameters of RF microwave devices, the Engen's TRL (Thru-Reflect-Line), calibration algorithm is studied in depth. An improved TRL calibration algorithm is proposed. And the use, of MATLAB program to achieve two calibration algorithms to correct the system error introduced by the measuring fixture, so as to get the real performance parameters of the device under test. Through the test of, the verification device, the agreement between the improved TRL algorithm and Engen's TRL algorithm is verified. The final design of the test fixture can be successfully applied to the network analyzer for noncoaxial, RF devices S-parameter measurement.

scholarly journals Parasitic Loop Inductances Reduction in the PCB Layout in GaN-Based Power Converters Using S-Parameters and EM Simulations

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1495
Author(s):  
Loris Pace ◽  
Nadir Idir ◽  
Thierry Duquesne ◽  
Jean-Claude De Jaeger
Keyword(s):  
High Frequency ◽  
Printed Circuit Board ◽  
Power Converters ◽  
Calibration Procedure ◽  
Circuit Board ◽  
Design System ◽  
Switching Speed ◽  
Parasitic Inductance ◽  
Frequency Converters ◽  
S Parameters

Due to the high switching speed of Gallium Nitride (GaN) transistors, parasitic inductances have significant impacts on power losses and electromagnetic interferences (EMI) in GaN-based power converters. Thus, the proper design of high-frequency converters in a simulation tool requires accurate electromagnetic (EM) modeling of the commutation loops. This work proposes an EM modeling of the parasitic inductance of a GaN-based commutation cell on a printed circuit board (PCB) using Advanced Design System (ADS®) software. Two different PCB designs of the commutation loop, lateral (single-sided) and vertical (double-sided) are characterized in terms of parasitic inductance contribution. An experimental approach based on S-parameters, the Cold FET technique and a specific calibration procedure is developed to obtain reference values for comparison with the proposed models. First, lateral and vertical PCB loop inductances are extracted. Then, the whole commutation loop inductances including the packaging of the GaN transistors are determined by developing an EM model of the device’s internal parasitic. The switching waveforms of the GaN transistors in a 1 MHz DC/DC converter are given for the different commutation loop designs. Finally, a discussion is proposed on the presented results and the development of advanced tools for high-frequency GaN-based power electronics design.

VOLTAGE CONTROL OF MAGNETISM IN MULTIFERROIC HETEROSTRUCTURES AND DEVICES

SPIN ◽  
2012 ◽  
Vol 02 (03) ◽  
pp. 1240004 ◽  
Author(s):  
NIAN X. SUN ◽  
GOPALAN SRINIVASAN
Keyword(s):  
Magnetic Field ◽  
Communication Systems ◽  
Recent Progress ◽  
Phase Shifters ◽  
Ultra Wideband ◽  
Superior Performance ◽  
Microwave Devices ◽  
Multiferroic Materials ◽  
Multiferroic Heterostructures ◽  
Rf Microwave

Multiferroic materials and devices have attracted intensified recent interests due to the demonstrated strong magnetoelectric (ME) coupling in new multiferroic materials and devices with unique functionalities and superior performance characteristics. Strong ME coupling has been demonstrated in a variety of multiferroic heterostructures, including bulk magnetic on ferro/piezoelectric multiferroic heterostructures, magnetic film on ferro/piezoelectric slab multiferroic heterostructures, thin film multiferroic heterostructures, etc. Different multiferroic devices have been demonstrated, which include magnetic sensors, energy harvesters, and voltage tunable multiferroic RF/microwave devices which are compact, lightweight, and power efficient. In this progress report, we cover the most recent progress on multiferroic heterostructures and devices with a focus on voltage tunable multiferroic heterostructures and devices with strong converse ME coupling. Recent progress on magnetic-field tunable RF/microwave devices are also covered, including novel non-reciprocal tunable bandpass filters with ultra wideband isolation, compact, low loss and high power handling phase shifters, etc. These novel tunable multiferroic heterostructures and devices and tunable magnetic devices provide great opportunities for next generation reconfigurable RF/microwave communication systems and radars, Spintronics, magnetic field sensing, etc.

Improvement of the Exergoeconomic “Fuel-Impact” Analysis for Acceptance Tests in Power Plants

1999 ◽  
Author(s):  
Alejandro Zaleta-Aguilar ◽  
Armando Gallegos-Muñoz ◽  
Antonio Valero ◽  
Javier Royo
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Field Data ◽  
Impact Analysis ◽  
Performance Test ◽  
Point Of View ◽  
Steam Turbines ◽  
The Real ◽  
Classical Procedure ◽  
Acceptance Tests

Abstract This work builds on the previous work on “Exergoeconomics Fuel-Impact” developed by Torres (1991), Valero et. al. (1994), and compares it with respect to the Performance Test Code (PTC’s) actually applied in power plants (ASME/ANSI PTC-6, 1970). With the objective of proposing procedures for PTC’s in power plant’s based on an exergoeconomics point of view. It was necessary to validate the Fuel-Impact Theories, and improve the conceptual expression, in order to make it more applicable to the real conditions in the plant. By mean of a program using simulation and field data, it was possible to validate and compare the procedures. This work has analyzed an example of a 110 MW Power Plant, in which all the exergetic costs have been determined for the steam cycle, and a fuel-impact analysis has been developed for the steam turbines at the design and off-design conditions. The result of the fuel-impact analysis is compared with respect to a classical procedure related in ASME-PTC-6.

scholarly journals Research on Calibration Algorithm of Non-coaxial RF Device Test Fixture

2019 ◽  
Vol 1237 ◽  
pp. 022177
Author(s):  
Chang Liang ◽  
Sun Qi Lin ◽  
Peng Yi Wei ◽  
Xiang Yi ◽  
Wang Zhuang ◽  
...  
Keyword(s):  
Test Fixture ◽  
Calibration Algorithm ◽  
Device Test

Design and Implementation of Green Design in Architectural Design System

2014 ◽  
Vol 716-717 ◽  
pp. 215-218
Author(s):  
Jing Xi ◽  
Xin Jian Chu
Keyword(s):  
Architectural Design ◽  
Green Building ◽  
Modern Society ◽  
Personal Space ◽  
Green Design ◽  
Design System ◽  
Sound Insulation ◽  
Human Beings ◽  
Green Consumption ◽  
The Real

In this paper, green design in modern society has many applications; green design has become a kind of fashion, people's consumption consciousness also gradually turned to green consumption. The real green design has not only the design itself, it was elevated to a kind of culture; promotion is a kind of spirit. For a nation, a community and all the field of culture and cultural phenomenon is of universal significance, is the nationality, is also the world, the real green design will never be out of date, it will develop with the development of the times, and always with people's life, and thus influence people's fife. The environmental protection, the "green building", beautiful and comfortable, it includes day lighting is ventilated, environmental pollution, noise insulation, sound insulation, traffic, beautify, etc. This is all indoor stylist people bring sensuous pleasure. The relationship between human beings and the environment is very harmonious with the environment; make the person, and style, forms, a full expression to care, An environmental atmosphere, A complete and free of personal space.

Multiferroic RF/Microwave Devices

2019 ◽  
pp. 157-174
Author(s):  
Wanjun Peng ◽  
Brandon Howe ◽  
Xi Yang
Keyword(s):  
Microwave Devices ◽  
Rf Microwave

Phylogenetic aspects of the concept of intelligent life design

2015 ◽  
Vol 11 (3) ◽  
Author(s):  
Zbigniew Krajewski
Keyword(s):  
Real World ◽  
Biological Systems ◽  
Evolutionary Model ◽  
Likelihood Method ◽  
Design System ◽  
The Real ◽  
Accommodation Process ◽  
New Treatment ◽  
Life Design ◽  
Intelligent Life

AbstractThis paper presents a new treatment of molecular evolutionary model as a product of intelligent changes. The aim of this paper is to obtain a life design system, drawing on processes occurring in nature regardless of explanations of the origins of life. The idea of intelligent design and molecular relationship is considered as a basic concept of the intelligent life design system, using some analogies taken from molecular evolutionary models. Three steps of life design system are outlined; however, the main subject is an attempt to find certain similar effects of the design system processes and the processes simulated with basic evolutionary substitution models: Jukes-Cantor; Felsenstein; and Hasegawa, Kishino, and Yano (HKY). An idea of gene reduction has been applied, from more complex (taking into account information density) biological systems to less complex, specialised biological systems. Two steps have been taken into consideration: a test stage in the virtual world and an adaptation finishing process after running the systems in the real world. Two algorithms have been applied. The first one has applied similarity related to an accommodation process to required conditions in the virtual and the real world. The second algorithm has applied accommodation to required conditions separately (expressed as amino acid substitution) in the first step, using a convenient criterion, and further (similar to observable) accommodation in the real world. A phylogenetic tree, similar to a real one, has been calculated using the above method for mammals, for mtDNA, with the maximum likelihood method, and with the aid of PhyML for the HKY model. This paper is an introduction showing an aspect of the life design system, related to phylogenetic relationships.

scholarly journals Fastener products lightweight design and forming process simulation

2018 ◽  
Vol 185 ◽  
pp. 00030
Author(s):  
Jinn-Jong Sheu ◽  
Chien-Jen Ho ◽  
Cheng-Hsien Yu ◽  
Kuo-Ting Wu
Keyword(s):  
Topology Optimization ◽  
Lightweight Design ◽  
Integrated Design ◽  
Optimization Method ◽  
Design System ◽  
Forming Process ◽  
Multi Stage ◽  
Die Stress ◽  
Final Design ◽  
Evaluation Stage

In this research, an integrated design system was established to design the product of nuts with flange and generate the lightweight geometry of product. The multi-stage forming process was evaluated using the CAE simulations. The topology optimization method was used to achieve the lightweight design, that included keeping necessary geometrical features and remove the excess volumes. The topological discrete model had been remodelled into a meaningful geometry which is able to satisfy the requirement of proof load of fastener specification. The final design of the lightweight geometry was adopted to test the capability of carrying proof load required using CAE simulations with the boundary conditions of the related ASTM standard. In the evaluation stage, the finite element method was used to do the topology optimization, the proof load evaluation, the forging process and the die stress analysis. The simulation results showed the lightweight design was able to reduce the weight of product and maintain enough mechanical strength. The proposed process and die designs were able to obtain the lightweight product without defects.

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