© The Institution of Electrical Engineers
A pulse compression acoustic microscope working at a centre frequency of 750 MHz is reported. The pulse expansion and compression is achieved by SAW dispersive delay lines. The transmitted chirp has a bandwidth of 150 MHz and a dispersion of 1 MHz/ns. A processing gain in excess of 10 dB has been achieved.
References
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1)
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Yue, G.Q., Nikoonahad, M., Ash, E.A.: `Subsurface acoustic microscopy using pulse compression techniques', Proc. IEEE Ultrasonics Symposium, 1982, p. 935–938.
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2)
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M. Nikoonahad ,
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Subsurface broadband acoustic microscopy of solids using reduced aperture lenses, Review of Progress in Quantitive NDE.
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3)
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Y. Guangqi ,
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Pulse compression subsurface acoustic microscopy.
Electron. Lett.
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767 -
769
http://iet.metastore.ingenta.com/content/journals/10.1049/el_19830533
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