Results 121 to 130 of about 1,397 (173)

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

Capacitive micromachined interdigital transducers

The Journal of the Acoustical Society of America, 2001
Capacitive Micromachined Ultrasonic Transducers (CMUTs) have become very popular for medical imaging and sonar applications during the last decade. They can compete with piezoelectric transducers in terms of efficiency and bandwidth. Recently, it has been noticed that these devices couple energy into silicon wafer in addition to the immersion medium ...
Goksen G. Yaralioglu, Mohammed H. Badi, Butrus T. Khuri-Yakub   +2 more
openaire   +1 more source

An interdigital transducer for acoustic imaging

Applied Physics Letters, 1977
We have devised a simple acoustic focusing device with an interdigital transducer in which all radiation from each section of the transducer constructively interferes at a focal point in water. The device is applicable to the acoustic imaging in both transmitting and reflecting modes.
Kohji Toda, Yoichi Murata
openaire   +1 more source

Field theory for interdigital transducers

Journal of Applied Physics, 1978
The analysis of quasiacoustic-wave excitation by the uniform interdigital transducer is approached from a field point of view. Fields within the transducer are expressed in terms of a set of normal-mode functions which have been defined specifically for the interdigital array.
M. J. Zuliani, V. M. Ristic
openaire   +1 more source

Description of interdigital transducers

Journal of Applied Physics, 1972
Interdigital 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, 2005
Interdigital 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