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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.
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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
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Liquid velocity measurement using interdigital transducers
Proceedings of the IEEE, 1981A system for measuring the velocity of a flowing liquid is presented using three interdigital transducers, one of which is used for the radiation of the compressional wave into the liquid. The velocity is estimated from the measurement of the output voltage corresponding to the phase difference between two output signals detected at the output ...
K. Toda, Y. Shinoda
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Ultrasonic Array Transducer Using Interdigital Electrode
Japanese Journal of Applied Physics, 1984A `planar array transducer' with interdigital electrodes is proposed. This paper describes the structure of the transducer and experimentally investigates its behavior and realization feasibility. A transducer directivity using PbTiO3 ceramics with a large electromechanical anisotropy shows the independent behavior of an array element that consists ...
Ryuichi Shinomura +3 more
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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
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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
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An interdigital transducer for acoustic imaging
Applied Physics Letters, 1977We 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
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Self-Consistent Theory of Interdigital Transducers
The Journal of the Acoustical Society of America, 1972The generation and absorption of surface waves by an interdigital transducer with uniform finger spacing are calculated with the aid of a surface dielectric constant related to the TM-wave impedance. It is found that the response of an infinite transducer can be calculated with complete consistency, i.e., the field due to the distortion of the ...
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SAW Transducers for NDE Applications Using Interdigital Bulk Wave Transducers
1981 Ultrasonics Symposium, 1981A new SAW transducer for NDE applications utilizing bulk-to-surface mode conversion is proposed and studied in theory and experiment. In this transducer an interdigital electrode on a piezoelectric block is used to generate and detect the angle beam of bulk waves.
M. Takeuchi, A. Hiwasa, H. Shimizu
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Acoustic focusing device with an interdigital transducer
The Journal of the Acoustical Society of America, 1977We have devised a new type of 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 position of the focal point of the device is variable by changing the carrier frequency of an electrical signal applied to the transducer.
Kohji Toda, Yohji Murata
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