Thursday, 24 November 2011

Resolution Bandwidth Filter #5

I found a screenshot that I took during the prototype test. It resembles the frequency response of the NDK 10F15DG after successfully tuning the matching circuit.

Really nice ripple of approximately 0.4 dB and the insertion loss is low too with only -2.4 dB. The picture actually states a loss of -7.9 dB but the input power was -5.5 dB.

The matching circuit was 3.3 uH in series and 10 pF + 5...25 pF trimmer in parallel,  if I remember correctly:

I recorded the 2-port touchstone data for this filter with 1600 points. You can download it as a zip file from my Google docs:

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