Results 161 to 170 of about 102,224 (204)
Some of the next articles are maybe not open access.
Description of interdigital transducers
Journal of Applied Physics, 1972Interdigital transducers can be represented as a linear array of elements that emit and reflect surface waves. This phenomenological description enables one to calculate the properties of these transducers accurately, provided that weak reflections between short-circuited finger pairs are taken into account.
openaire +1 more source
Design of interdigital transducers for crack detection in plates
Ultrasonics, 2005Interdigital transducers (IDT) for non-destructive evaluation (NDE) of cracks in plates are designed based on an analytical model established previously. Key considerations include mode selectivity, excitation strength, collimation of wave and cost.
Jin, J., Quek, S.T., Wang, Q.
openaire +3 more sources
Diffraction analysis of slanted finger interdigital transducers
2000 IEEE Ultrasonics Symposium. Proceedings. An International Symposium (Cat. No.00CH37121), 2001For analysis, Slanted Finger Interdigital Transducers (SFIT) are usually divided into many channels in parallel to the propagation direction. Every channel is considered to be a subfilter. This procedure neglects the diffraction completely. The present paper introduces the diffraction in the SFIT analysis by use of the Angular Spectrum of Plane Waves ...
G. Martin, D. Chen
openaire +1 more source
Equivalent networks for SAW interdigital transducers
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1994An equivalent network approach is described for the analysis of surface-acoustic-wave interdigital transducers. Circuit parameters can he theoretically determined by applying the finite-element method to an infinite array. In this approach, all the effects of piezoelectric perturbation, mechanical perturbation, and energy storage are taken into account,
K. Inagawa, M. Koshiba
openaire +1 more source
Interdigitated PVDF transducer for flaw detection
SPIE Proceedings, 2006Since the recognition of the advantages of using Lamb Waves in nondestructive testing (NDT), Lamb Waves and other guided waves have attracted more and more attention nowadays. Unlike waves used in conventional ultrasonic inspection, such as bulk longitudinal and shear waves, which propagate in the region of structure immediately around the transmitting
Hua Gu, Ming L. Wang
openaire +1 more source
A New Interdigital Electrode Transducer Geometry
IEEE Transactions on Microwave Theory and Techniques, 1974A new interdigital electrode transducer geometry has been conceived and its theoretical performance verified experimentally. The transducer is composed of sets of electrodes which are connected in series through an offset or "dog-leg" electrode, thereby significantly increasing the electrical impedance of the transducer over that of a conventional one ...
K.M. Lakin, D.W.T. Mih, R.M. Tarr
openaire +1 more source
Interdigital Transducer Interaction with SAWS and BAWS
IEEE 1987 Ultrasonics Symposium, 1987The aim of this work is a rigorous approach to the two-dimensional analysis of excitation, propaga- tion and detection of acoustic waves. For the efficient computation of the dynamic charge distribution on IDTs we use the concept of Green's function and the method of moments.
K.C. Wagner +3 more
openaire +1 more source
Algorithm for optimization of interdigital transducer in AOTF
Optics & Laser Technology, 2007Abstract The interdigital transducer is an important device element in acousto-optic tunable filter (AOTF) and the surface acoustic wave (SAW) propagates in lithium niobate (LiNbO3) as a substrate in interdigital transducer. In the direction of x-cut y propagation in AOTF, the power-flux vector and propagation direction of the surface wave are not ...
Limin Zhang, Jisheng Yang
openaire +1 more source
An interdigital transducer for ultrasonic nondestructive testing
Journal of Applied Physics, 1982A technique for nondestructive testing of materials is described, which uses two arched interdigital transducers operating at a liquid-solid interface. The transducer has a frequency-dependent radiation angle. Two pairs of arched interdigital electrodes on the same surface of a piezoelectric substrate are not in contact with the liquid.
Kohji Toda +3 more
openaire +1 more source
The dual harmonic interdigital transducers (DHIDT)
Proceedings of International Frequency Control Symposium, 2002In order to increase the operating frequency, many authors have addressed in different methods to overcome the difficulty of submicron processes in fabrications. Due to the great success that the quasi-harmonic interdigital transducers (QHIDT) have got, this paper presents a structure, called the harmonic dual interdigital transducers (DHIDT), in which
null Fan Zhai, null De Zhang
openaire +1 more source