Re: NEC-LIST: microstrip transmission lines

John-

The configuration you describe is know as "inverted microstrip".

See Transmission Line Design Handbook by Brian Wadell pages 138-140.
The equations are too involved to type in, but I could fax you the
data if you would like.

Other references that I have listed are:

  Tomar, R.S. and Prakash Bhartia, "Suspended and Inverted Microstrip
  Design", Microwave Journal, March 1986, pp173-177

  Tomar,R.S. and Prakash Bhartia, "New Quasi-Static models for the
  Computer Aided Design of Suspended and Inverted Microstrip Lines",
  IEEE Transactions on Microwave Theory and Techniques, Vol MTT-35
  No.4, April 1987, pp 453-457 and Corrections, November 1987, p 1076.

  Gunston, M.A.R., Microwave Transmission-line Impedance Data,
  Van Nostrand Reinhold Company, London, 1972
        
        
-Ray Anderson

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Received on Thu Feb 19 1998 - 09:49:25 EST