Effects of diffraction on frequency response of bulkacoustic-wave-beam filters

Access Full Text

Effects of diffraction on frequency response of bulkacoustic-wave-beam filters

For access to this article, please select a purchase option:

Buy article PDF
£12.50
(plus tax if applicable)
Add to cart
Buy Knowledge Pack
10 articles for £75.00
(plus taxes if applicable)
Add to cart

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Name:*
Email:*
Your details
Name:*
Email:*
Department:*
Why are you recommending this title?
Select reason:
 
 
 
 
 
Electronics Letters — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

© The Institution of Electrical Engineers
Published

The letter deals with the effects of diffraction or beam spreading on frequency response of bulkacoustic-wave-beam filters. Theoretical analysis for 41°-rotated Y-cut LiNbO3 has shown that, when the propagation distance is comparable to the acoustic length of the interdigital transducers (IDTs), the bandwidth is significantly increased over the SAW response with the same IDTs. If the propagation distance is within several times the IDT acoustic length, insertion loss is almost independent of propagation distance. These results suggest that there may be a situation where an increased fractional bandwidth for a given insertion loss is achievable. An experimental result was compared with the theoretical calculation.

Inspec keywords: filters; acoustic devices; acoustic wave diffraction; frequency response

Other keywords: bulk-acoustic-wave-beam filters; Y-cut LiNbO3; beam spreading; interdigital transducers; insertion loss; frequency response; diffraction effect; propagation distance

Subjects: Acoustical measurements and instrumentation; Acoustic wave devices

References

    1. 1)
      • Helmick, C.N., White, D.J., Lakin, K.M.: `Deep bulk acoustic wave devices utilizing interdigital transducers', Proceedings of 1981 Ultrasonics Symposium, p. 280–285.
    2. 2)
      • P.D. Bloch , N.G. Doe , E.G.S. Paige . Behaviour of device structures based on IDT-launched bulk acoustic waves in a parallel-sided plate of lithium niobate. Electron. Lett. , 871 - 873
    3. 3)
      • M.F. Lewis . High frequency acoustic plate mode device employing interdigital transducers. Electron. Lett. , 819 - 821
    4. 4)
      • M. Goodberlet , D.L. Lee , J.F. Vetelino . Temperature stability of surface generated bulk waves. Electron. Lett. , 740 - 741
    5. 5)
      • Yamaguchi, M., Hashimoto, K.Y., Uzawa, K., Kogo, H.: `LiNbO', Proceedings of 1983 Ultrasonics Symposium, (to be published).
http://iet.metastore.ingenta.com/content/journals/10.1049/el_19840188
Loading

Related content

content/journals/10.1049/el_19840188
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading