Results 151 to 160 of about 75,030 (206)

Electromagnetic Leakage Suppression by Interdigital Transducers

Proceedings of the IEEE, 1975
A simple interdigital transducer layout is used in conjunction with a differential amplifier to obtain a high degree of suppression of direct electromagnetic leakages in surface acoustic wave devices. The degree of suppression can be adjusted independently of the device design.
exaly   +2 more sources

Optimization of Interdigital Transducers for the Generation of Surface Acoustic Waves Over a Large Bandwidth (20–125 MHz)

Sensors and Actuators A: Physical, 2018
JIF=2.739International audienceIn this paper, wideband interdigital transducers (IDT) to excite surface acoustic waves (SAW) have been developed and optimized.
Nikolay Smagin, Mohammadi Ouaftouh, Marc Duquennoy   +2 more
exaly   +2 more sources

Superconducting interdigital transducers

Proceedings of IEEE Ultrasonics Symposium ULTSYM-94, 1994
A 50 MHz surface acoustic wave (SAW) delay line consisting of two interdigital transducers (IDTs) has been fabricated from a thin film of YBa2Cu3O7-d, a high temperature superconductor, deposited on YZ LiNbO3. The insertion loss measured as a function of temperature shows a large improvement (~12 dB) at the superconducting transition.
null Feller, null Levy, null Sarma, null Fredricksen, null Ritums, null Wu, null Li, null Ignatiev   +7 more
openaire   +1 more source

Circular interdigital transducers

Journal of Applied Physics, 1990
The purpose of this article is to establish the focusing properties of a new kind of transducer consisting of circular electrodes deposited on an isotropic substrate and covered by a thin piezoelectric layer. We first express the electromechanical equations of the device and determine its boundary conditions.
S. Barbaid, J. Duclos, M. Leduc
openaire   +1 more source

Analysis and design of focused interdigital transducers

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2005
Focused interdigital transducers (FIDTs) can generate surface acoustic wave (SAW) with high intensity and high beamwidth compression ratio. Owing to these features, they are very suitable to be used as the sources of microacoustic channels or waveguides in the near future. The focusing properties of FIDTs are dominated solely by their geometric shapes.
Tsung-Tsong, Wu, He-Tai, Tang, Yung-Yu, Chen, Pei-Ling, Liu   +3 more
openaire   +2 more sources

Usage of symmetry in the simulation of interdigital transducers

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2010
This paper discusses the application of the finite element method to the simulation of surface acoustic wave generation on piezoelectric substrates and the possibility of reducing the number of computations by taking into account the symmetry of the problem.
Alexander N, Darinskii, Manfred, Weihnacht, Hagen, Schmidt   +2 more
openaire   +2 more sources

Electrostatics of interdigital transducers

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2004
Interdigital transducers are systems of conducting strips on a piezoelectric halfspace; in some systems, the groups of strips repeat periodically over a transducer counting hundreds of strips that can be considered infinite. An infinite planar periodic system of groups of strips with adequate period, sufficiently large if necessary, is considered to ...
openaire   +2 more sources

Active Matching of Interdigital Transducers

1981 Ultrasonics Symposium, 1981
Active matching circuits have been developed for matching SAW IDTs to 50 0 generators and receivers. 1 ow input impedance receiver a1 lows the elimination of the inductor usually needed to tune o ut the IDT capacity. The frequency dependence of the radiation admittance is compensated by a single stage active circuit.
A.F. Arbel, J.E. Bowers
openaire   +1 more source

Quasi-harmonic interdigital transducers

1995 IEEE Ultrasonics Symposium. Proceedings. An International Symposium, 2002
This paper presents a quasi-harmonic interdigital transducer (QHIDT) utilized for SAW filters. The QHIDT consists of several single electrode transducers which serve as elemental transducers. The width and position of the electrodes in the elemental transducer was considered to eliminate the inter multi-reflection between the electrodes. Therefore, the
X.T. Yin, D. Zhang, P. Wu, J. Yu
openaire   +1 more source

Magnetostatic wave interdigital transducers

Journal of Applied Physics, 1978
The design and operation of a novel type of magnetostatic wave transducer is described. The transducer is formed from an interdigital arrangement of narrow, open circuited microstrip fingers, each half an electromagnetic wavelength long. Experimental results in the frequency range 9–9.4 GHz are presented for 2, 4 and 10 finger transducers which are in ...
J. D. Adam, R. W. Patterson, T. W. O’Keeffe   +2 more
openaire   +1 more source