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Spectral-domain analysis of submillimetre-wave microstrip filters

  • S. Withington
  • G. Yassin
Article

Abstract

We consider the cut-off frequencies of high-order modes in boxed submillimetre-wave microstrip filters. It is shown that many of the filters in use at the present time are not cut off in the way that the designers imagine. It is also shown that for ease of manufacture the height of the microstrip channel should be 0.7 times the width and the thickness of the quartz substrate should be 0.5 times the width. This optimum geometry suggests that the upper frequency limit of conventional waveguide components is 1THz.

Keywords

Quartz Optimum Geometry Frequency Limit Quartz Substrate Microstrip Filter 
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References

  1. [1]
    T. Newman, W.L. Bishop, K.T. Ng, S. Weinreb, “A novel diode mixer for submillimetre-wave applications,” IEEE Trans. Microwave Theory Tech., vol. MTT-39, pp.1964–1971, Dec. 1991.Google Scholar
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    R.E. Collin, “Field theory of guided waves,” IEEE Press, 1991.Google Scholar
  3. [3]
    R.H. Jansen, “High-speed computation of single and coupled microstrip parameters including dispersion, high-order modes, loss and finite strip thickness,” IEEE Trans. Microwave Theory Tech., vol. MTT-26, pp. 75–82, Feb. 1978.Google Scholar
  4. [4]
    B. Bhat and S.K. Koul, “Stripline-like transmission lines for microwave integrated circuits,” John Wiley and Sons, 1989.Google Scholar

Copyright information

© Plenum Publishing Corporation 1993

Authors and Affiliations

  • S. Withington
    • 1
  • G. Yassin
    • 1
  1. 1.Cavendish LaboratoryCambridgeUnited Kingdom

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