Your browser does not support JavaScript!

Effect of enhanced current crowding in a CPW with a thin ferroelectric film

Effect of enhanced current crowding in a CPW with a thin ferroelectric film

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.

Enhanced current crowding is predicted at the edges of the conducting strips in thin ferroelectric film coplanar waveguides (CPWs). A minimum current crowding depth is expected, which depends on the CPW geometry and dielectric constant of the ferroelectric film. In practical CPW devices the enhanced current crowding can increase the conductor losses by up to four times. The current crowding depth may be smaller than the skin depth or London penetration depth (for high temperature superconducting CPW).


    1. 1)
      • D.C. Degroot , J.A. Beall , R.B. Marks , D.A. Rudman . Microwave properties of voltage-tunable YBa2Cu3O7-x/SrTiO3coplanarwaveguide transmission lines. IEEE Trans. Appl. Supercond. , 2272 - 2275
    2. 2)
      • G.L. Matthaei , K. Kiziloglu , N. Dagli , S.I. Long . The nature ofthe charges, currents, and fields in and about conductors having cross-sectionaldimensions of the order of a skin depth. IEEE Trans. , 1031 - 1036
    3. 3)
      • S. Gevorgian , P. Linner , E. Kollberg . CAD models for shieldedmultilayered CPW. IEEE Trans. , 772 - 719
    4. 4)
      • G. Ghione . A CAD oriented analytic model for the losses of general asymmetriccoplanar lines in hybrid and monolithic MIC's. IEEE Trans.
    5. 5)
      • N.H. Zhu , E.Y.B. Pun , P.S. Chung . Field distribution in supportedcoplanar lines using conformal mapping techniques. IEEE Trans. , 1493 - 1496
    6. 6)
      • C.L. Holloway , E.F. Kuester . A quasi-closed form expression forthe conductor loss of CPW lines, with an investigation of edge shape effects. IEEE Trans. , 2695 - 2701
    7. 7)
      • A.T. Findikoglu , Q.X. Jia , I.H. Campbell , X.D. Wu . Electricallytunable coplanar transmission line resonators using YBa2Cu3O7-x/SrTiO3 bilayers. Appl. Phys. Lett. , 3674 - 3676
    8. 8)
      • M. Gillick , I.D. Robertson , J.S. Joshi . An analytical method fordirect calculation of E & H-field patterns of conductor-backed coplanarwaveguides. IEEE Trans. , 1606 - 1610

Related content

This is a required field
Please enter a valid email address