Experimental modelling of groove effect on finline transitions at Ka-Band

  • Ashok Mittal


The mounting groove of finline circuits is always the area of research for low loss E-Plane components. The normal practice says, the groove depth should be kept λ/4 or λ/2 according to the termination at the top surface for electrical short inside the waveguide. Here we have investigated the effect experimentally at Ka-Band for short ended circuit grooves. It has been found that if the groove depth is kept λ/10, just adequate to hold the card vertical rigidly, considerable improvement has been observed in the Insertion Loss of the line. An improvement of 0.6 dB has been observed with λ/4 to λ/10 groove depth for short ended circuit for Symmetric unilateral finline.


Experimental Modelling Considerable Improvement Normal Practice Groove Depth Groove Effect 
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VI References

  1. [1]
    T. Kezai, R. Sciuto, A. Vander Vorst, "Experimental Evidence of Mounting Grooves and Serration Patterns of Finline Characteristics", Int. Journal of Infrared and Millimetre Waves, Vol 14, No.5, 1993, pp 1035–1046.Google Scholar
  2. [2]
    R. Vahldieck, W.J.R. Hoefer, "The influence of metallization thickness and mounting grooves on the characteristics of finlines", IEEE MTT-S Digest 1985, pp 143–145.Google Scholar
  3. [3]
    X. Chen, L. Xue, "Experimental investigations of the influence of mounting grooves and serration patterns on the transmission characteristic of finlines", Int. Journal of Infrared and Millimetre Waves, Vol 12, No.8, 1991, pp 905–910.Google Scholar

Copyright information

© Plenum Publishing Corporation 1996

Authors and Affiliations

  • Ashok Mittal
    • 1
  1. 1.Defense Electronics Applications LaboratoryDehradun-248India

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