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Join Date: Nov 2001
Location: College Park, MD
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Well, attenuation tends to increase with frequency when the signal is subjected to inductance, but it also tends to decrease in response to an increase in capacitance.
Have you ever noticed that in relatively cheap, older signal processing devices (cough-Pico-cough), the air core inductors look nice and pretty but in the more expensive ones, they look shabby? I've been told by an old timer that in the expensive ones, they engineered the coil's induction value to be just a hair greater than the calculated, optimal value, and then "touch it up" by poking it with a non-inductive tool to reduce its actual inductance, and then they squirt it with whatever to hold it in place. I think you'd be hard pressed to develop a model that would accurately reflect the exact inductive reactance that takes place in a lot of passive RF components.
Last edited by AntAltMike; 06-27-2014 at 03:03 PM.