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180 DEGREE REFLECTIVITY AND VELOCITY PERTURBATION OF THIN METAL DOTS.

Huang, F; Paige, EGS; Selviah, DR; (1985) 180 DEGREE REFLECTIVITY AND VELOCITY PERTURBATION OF THIN METAL DOTS. In: (pp. pp. 11-15). Green open access

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Abstract

Reflective arrays of rectangular thin metal 'dots' spaced in a regular or near regular grid pattern, such as have been used in surface acoustic wave resonators and in-line dot RACs on LiNbO//3 , are analyzed. The half-wavelength spacing of dots required leads to capacitative coupling between adjacent dots. The charge distribution induced on the dots by the passage of the SAW is presented including the coupling. The 180 degree SAW reflectivity of the dots and the SAW velocity perturbation through the dot array are given for a range of dot sizes. These are shown to be in good agreement with experimental results. The work establishes that the method of analysis can form the basis of the design of 180 degree reflective weighted dot arrays, allowing them to be implemented through varying dot density and/or by varying dot dimensions.

Type: Proceedings paper
Title: 180 DEGREE REFLECTIVITY AND VELOCITY PERTURBATION OF THIN METAL DOTS.
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/ultsym.1985.198469
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/2676
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