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About RF Cafe
1996 - 2016
BSEE - KB3UON
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...
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The following table gives equation and schematic transforms necessary to convert normalized lowpass filter prototype values (1 rad/sec cutoff, 1 Ω source & load impedance).
R = source/load resistance in Ω
CProto, LProto = prototype lowpass capacitor or
C, L = denormalized capacitor or inductor value,
FUpper & FLower = upper and lower cutoff
Final C and L values will be in farads (F) and
|Type||Transform Equation||Transform Schematic|
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