ANALYSIS AND SYNTHESIS OF RADIATION PATTERNS FROM CIRCULAR APERTURES

1960 ◽  
Vol 38 (1) ◽  
pp. 78-99 ◽  
Author(s):  
A. Ishimaru ◽  
G. Held
Keyword(s):  
Radiation Pattern ◽  
Traveling Wave ◽  
Design Method ◽  
Source Distribution ◽  
Circular Aperture ◽  
Narrow Beam ◽  
Wave Type ◽  
Numerical Examples ◽  
Analysis And Synthesis ◽  
Improved Design

Part I considers the problem of determining the source distribution over a circular aperture required to produce a prescribed radiation pattern. In particular, the problem of optimizing the narrow broadside pattern from a circular aperture is discussed in detail and an improved design method over Taylor's for line source is devised. Numerical examples are given.Part II deals with the analysis of the radiation pattern from a circular aperture from γ1 to γ2 with the traveling wave type source functions. Expressions suitable to the analysis and the synthesis are obtained and the narrow-beam and shaped-beam synthesis are discussed.

Analysis and Design of Stator of Traveling Wave Type Rotary Ultrasonic Motor

2011 ◽  
Vol 199-200 ◽  
pp. 805-810
Author(s):  
Chao Chen ◽  
Ru Juan Chen
Keyword(s):  
Traveling Wave ◽  
Design Method ◽  
Computation Time ◽  
Good Control ◽  
Ultrasonic Motor ◽  
Piezoelectric Composite ◽  
Heat Output ◽  
Complex Geometries ◽  
Wave Type ◽  
Analysis And Design

Due to its compact sizing, fast response and good control performance traveling wave type rotary ultrasonic motor (TRUM) has significant potentials for applications in robot actuation. In order to considering the complex geometries, this paper presents modeling approach for micro-TRUM stator. First piezoelectric composite stator is partitioned into three substructures, two of which are modeled as several continuous annular plates by semi-analytical method. Without losing the complex geometries, the stator teeth as another substructure are modeled by means of finite element (FE) approach. Based on both component-mode synthesis and dynamic reduction, the coupled method for continuous plate and FE discretized teeth is presented in order to consider dynamic behavior of composite stator with good accuracy and short computation time. It allows combination of the continuous parameters and FE discretized substructures, and the mathematical model representing the complete stator is derived. Finally the prototype is manufactured according to the presented method. The validation of the analysis and design method is attained through the experiments for the manufactured stator. It is pointed that radial friction can be capable to increase s for the ultrasonic motor with smaller dimension. It explains why micro-TRUM has a fast heat output at the contact interface.

Application of superconducting striplines to traveling-wave type LiNbO/sub 3/ optical modulator

1993 ◽  
Vol 3 (1) ◽  
pp. 2792-2795 ◽  
Author(s):  
K. Yoshida ◽  
K. Ikeda ◽  
K. Saito ◽  
Y. Kanda
Keyword(s):  
Traveling Wave ◽  
Optical Modulator ◽  
Wave Type

Design Sheet Beam Gun for THz Traveling-Wave Tube

2014 ◽  
Vol 541-542 ◽  
pp. 470-473 ◽  
Author(s):  
Zhan Liang Wang ◽  
Yu Bin Gong ◽  
Hua Rong Gong ◽  
Jin Jun Feng ◽  
Xiong Xu
Keyword(s):  
Electron Beam ◽  
Traveling Wave ◽  
Design Method ◽  
Terahertz Wave ◽  
Wave Radiation ◽  
Traveling Wave Tube ◽  
Wave Tube ◽  
Electron Device ◽  
Particle In Cell ◽  
Sheet Electron Beam

The Sheet Electron Beam Vacuum Electron Device is an Attractive Choice for Generating High Power Millimeter/terahertz Wave Radiation. the Sheet Electron Beam Gun is a Key Component for the Sheet Beam Vacuum Electron Device. in this Paper, a Novel Sheet Electron Beam Gun was Proposed for a Terahertz Traveling-Wave Tube. the Theories of Sheet Beam Gun are Deduced Based on the Round Beam Gun Theories. the Track of 24.5kV, 1A, 0.4mm8mm Sheet Beam is Gained through 3D Particle-in-Cell Simulation and the Theories are Verified. the Investigation Results Show that, the Design Method of the Sheet Beam Gun is Easy and Reliable.

Improved design method for 2-arch tunnel

2007 ◽  
Author(s):  
Seok-Won Lee ◽  
Wan Gi Jeon ◽  
Kyeong-Han Jeong ◽  
Hyun-Ho Ahn ◽  
Ju Hyoung Lee
Keyword(s):  
Design Method ◽  
Improved Design

scholarly journals Strategic company management in the digital business environment

2018 ◽  
Vol 26 (3-4) ◽  
pp. 82-91
Author(s):  
Mykola Gennadiyovych Nikolaev
Keyword(s):  
Strategic Management ◽  
Industrial Revolution ◽  
Design Method ◽  
Business Environment ◽  
Future Research ◽  
Digital Environment ◽  
Doing Business ◽  
Analysis And Synthesis ◽  
Modern Business ◽  
The Impact

Purpose – to analyze strategic company management in the digital business environment. Design/Method/Approach. General scientific methods are applied: systematization, comparison, generalization, analysis, and synthesis. Findings. The essence of strategic management and its significance to a company has been analyzed. The relationship between strategic company management and digital business environment has been elucidated. Basic trends for doing business in the digital environment have been defined. Theoretical implications. Theoretical significance of the research is in the advancement of opinion on the strategic company management in digital business environment. Practical implications. The practical value of the research is in the possibility of applying the results obtained by both international and domestic companies for strategic management in the digital business environment that emerged as a result of the Fourth industrial revolution. Originality/Value. The main trends of modern business in the digital environment have been identified. The choice of strategies of multinational companies has been identified, as well as the areas of their application in digital business environment. Research limitations/Future research. The prospects for further research are to study the strategic management of international companies and analyze the impact of digital business environment on their development. Paper type – theoretical.

Improved design method for continuous-time quadrature bandpass ADCs

2005 ◽  
Vol 41 (8) ◽  
pp. 461 ◽  
Author(s):  
S. Reekmans ◽  
J. De Maeyer ◽  
P. Rombouts ◽  
L. Weyten
Keyword(s):  
Continuous Time ◽  
Design Method ◽  
Improved Design

Measurement of the temperature of pipes with low dielectric losses in traveling-wave type microwave devices

2009 ◽  
Vol 52 (6) ◽  
pp. 673-675
Author(s):  
D. A. Loik ◽  
A. V. Mamontov ◽  
I. V. Nazarov ◽  
V. N. Nefedov ◽  
T. A. Potapova
Keyword(s):  
Traveling Wave ◽  
Microwave Devices ◽  
Dielectric Losses ◽  
Wave Type ◽  
Low Dielectric
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