Results 191 to 200 of about 671 (237)

Thin Vibrator with Variable Impedance in Rectangular Waveguide

2006 16th International Crimean Microwave and Telecommunication Technology, 2006
The problem of scattering wave of type H10 by the thin vibrator with the variable surface impedance allocated in a rectangular waveguide is solved with the method of induced electromotive force.
V A Katrich
exaly   +2 more sources

Impedance Synthesis for Vibrator Antenna Arrays

Lecture Notes in Electrical Engineering
S L Berdnik, Oleksandr Dumin, Anatoliy I Luchaninov   +2 more
exaly   +2 more sources

The impedance vibrator in an anisotropic plasma

IEEE Antennas and Propagation Society International Symposium. 1995 Digest, 1995
The exciting of the waves in a plasma are one of the most important problem in new methods of acceleration using plasma waveguides. The task become particularly complicated if the external magnetic field appear because in this case the plasma will be anisotropic.
Khizhnyak, N. A., Yatsenko, Evgueniy O., Yatsenko, Natalia M.   +2 more
openaire   +2 more sources

Analysis of the point mechanical impedance of fingerpad in vibration

Medical Engineering & Physics, 2006
Biodynamic responses of the finger-hand-arm system, such as apparent mass and mechanical impedance, characterize the relationship between the motion of the finger-hand-arm system and the dynamic force acting on the driving point, and they are useful for vibration exposure assessment. In the present study, a two-dimensional finite element (FE) model has
J Z, Wu, R G, Dong, D E, Welcome
openaire   +2 more sources

Digital synthetic impedance for application in vibration damping

Review of Scientific Instruments, 2016
In this work we present construction details of a precision, standalone, and compact digital synthetic impedance for application in the field of vibration damping. The presented device is based on an embedded ARM microcontroller with external AD and DA converters and a special analog front-end.
J, Nečásek, J, Václavík, P, Marton
openaire   +2 more sources

Optimal impedance design for piezoelectric vibration control

2004 43rd IEEE Conference on Decision and Control (CDC) (IEEE Cat. No.04CH37601), 2004
Piezoelectric transducers are commonly used as strain actuators in the control of mechanical vibration. One control strategy, termed piezoelectric shunt damping, involves the connection of an electrical impedance to the terminals of a structurally bonded transducer.
Andrew J. Fleming, S. O. Reza Moheimani
openaire   +1 more source

Yagi-Uda antenna with impedance vibrators

2010 20th International Crimean Conference "Microwave & Telecommunication Technology", 2010
The solution of a problem of current distribution in Yagi-Uda antenna with impedance vibrators is represented. The influence of surface impedance of the vibrators on electrodynami-cal characteristics of considered structure has been investigated.
M. V. Nesterenko, V. A. Katrich, S. L. Berdnik, Yu. M. Penkin   +3 more
openaire   +1 more source

Impedance-matched vibration massager

The Journal of the Acoustical Society of America, 2009
A hand-held massager capable of self-excited, impedance-matched vibration for optimal massaging of each particular body part of each particular individual. The massager includes a hollow, open-ended contact piece to which is coupled a vibrator and which is to be held against a desired body part.
openaire   +1 more source

System of impedance vibrators in anisotropic plasma

IEEE Antennas and Propagation Society International Symposium. 1998 Digest. Antennas: Gateways to the Global Network. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.98CH36194), 2002
Discusses research into linear antennas in anisotropic media. The purpose of the present work is to study the excitation of a system of thin impedance vibrators located in an anisotropic plasma, the permittivity tensor of which can contain not only positive, but also negative components.
N.A. Khizhnyak, N.M. Jatsenko, E.A. Jatsenko   +2 more
openaire   +1 more source

Acoustic input impedance of a vibrating cylindrical tube

Journal of Sound and Vibration, 2007
An analytical approach to the acoustic input impedance of vibrating cylindrical pipes is considered. The variation in the acoustic impedance introduced by wall vibrations is calculated using the integro-modal method taking into account axisymmetric shell vibration. It is shown that this variation can be interpreted as a small correction in the acoustic
R. Picó, F. Gautier, J. Redondo
openaire   +1 more source