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Text File  |  1996-06-22  |  808b  |  17 lines
  1. This routine designs a low-pass diplexer filter, that has a constant
  2. input impedance of Zo at all frequencies, both in the pass-band and in
  3. the stop-band. S11 is always good. S22 is poor in the stop-band.
  4. When used at a mixer termination, make the cutoff frequency sqrt(IF*Image)
  5.  
  6. ------------------L1--------------------------------------
  7.                    |                         |
  8.                    |                         |
  9. 1->                C                         |         <- 2
  10.                    |                         C
  11.                    --------                  |
  12.                    |      |                  |
  13.                    R      L                  |
  14.                    |      |                  |
  15. ------------------------------------------------------------
  16.  
  17.