|Statement||Michael J.J. Zuliani.|
|Contributions||Toronto, Ont. University.|
|The Physical Object|
|Pagination||190 leaves in various pagings :|
|Number of Pages||190|
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. Dispersion relations for these normal‐mode functions are found to display band‐gap regions with complex wave Cited by: 4. Instead, the fringing electric field sensors are given the deepest emphasis in this manuscript. Significant aspects of other types of sensors are discussed, while repe-tition is avoided. References are provided to major review papers and books in each section devoted to a particular field of interdigital electrode applications, such as dielectricFile Size: 1MB. W.R. Smith: Experimental Distinction Between Crossed-Field and In-Line Three-Port Circuit Models for Interdigital Transducers, IEEE Trans. Microwave Theory and tech., MTT . Abstract: This review paper focuses on interdigital electrodes-a geometric structure encountered in a wide variety of sensor and transducer designs. Physical and chemical principles behind the operation of these devices vary so much across different fields of science and technology that the common features present in all devices are often overlooked.
Two interlocking comb-shaped metallic patterns applied to a piezoelectric substrate such as quartz or lithium niobate, used for converting microwave voltages to surface acoustic waves, or vice versa. The generation and absorption of surface waves by an interdigital transducer with uniform finger spacing are calculated with the aid of a surface . Green J B, Kino G S and Khuri-Yakub B T Focused surface wave transducers on anisotropic substrates: a theory developed for the waveguided storage correlator IEEE Ultrasonics Symp. pp  Fang S R, Zhang S Y and Feng Z SAW focusing by circular-arc interdigital transducers on YZ-LiNbO3 I IEEE Trans. Ultrason. This principle is used in interdigital transducers and multistrip couplers. A basic concept used in the analysis of these components is the effective permittivity, which gives a description of the electrical behavior of the surface by taking account of the acoustic behavior of the material. This chapter gives the basic theory pertaining to this.
Rigorous, full-field theory of single-phase interdigital transducers is presented and extended, by perturbation analysis, to account for the mechanical properties of strips. Wilcox P., Monkhouse R., Lowe M., Cawley P. () The Use of Huygens’ Principle to Model the Acoustic Field from Interdigital Lamb Wave Transducers. In: Thompson D.O., Chimenti D.E. (eds) Review of Progress in Quantitative Nondestructive Evaluation. Interdigital transducers (IDTs) made from the piezoelectric polymer PVDF have been built; they transmit ultrasonic Lamb waves into 1–2 mm thick steel and aluminium plates and receive signals reflected from features in the structure. The IDTs are designed to be permanently bonded to the structure under inspection. Such IDTs have considerable potential for use in smart-structure monitoring. In strong piezoelectrics, corresponding to 'crossed-field' model, the impulse response carries the image of the partial potential associated with the normal component of the electric field. Using Poynting's theorem and results from the field theory of interdigital transducers the radiation conductance and susceptance were found without a use of.