Improved coupling formula for dual monolithic crystal filters

Improved coupling formula for dual monolithic crystal filters

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

Buy article PDF
(plus tax if applicable)
Buy Knowledge Pack
10 articles for $120.00
(plus taxes if applicable)

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
Your details
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.

In a new approach, based on the fact that resonance frequencies of monolithic crystal filters are obtained as roots of frequency equations, an improved coupling formula is derived.


    1. 1)
      • Beaver, W.D.: `Theory and design principles of the monolithic crystal filter', 1967, Ph.D. dissertation, Lehigh University, Bethlehem, Pa..
    2. 2)
      • D.F. Sheahan . An improved resonance equation for AT-cut quartz crystals. Proc. IEEE , 260 - 261
    3. 3)
      • R.A. Sykes , W.L. Smith , W.J. Spencer . Monolithic crystal filters. IEEE International Convention Record
    4. 4)
      • P. Schnabel . Frequency equations for n mechanically coupled piezoelectric resonators. Acustica , 351 - 357
    5. 5)
      • Beck, E., Schultze, E., Meyer, H.: `An admittance approach to the dual monolithic crystal filter', Proceedings of IEEE international symposium on circuits and systems, 1976, p. 316–319.
    6. 6)
      • W.D. Beaver . Analysis of elastically coupled piezoelectric resonators. J. Acoust. Soc. Am. , 972 - 981
    7. 7)
      • Internal report, , available on request from the authors.

Related content

This is a required field
Please enter a valid email address