R,C,L under High Freq

[Indian]

How resistor capacitor inductor behaves under high frequencies

 

[rkodaira]

Resistor will work as a pure resistance under high frequencies (or low frequencies).

Capacitors will present a very low reactance (and impedance) to high frequency signals.

Xc = 1 / (ωC)

Zc = 1 / jωC

Inductors will present a high reactance (and impedance) to high frequency signals.

Xl = ωL

Zl = jωL

(ω = 2 x PI x f)

 

[Borber]

What rkodaira said is valid for ideal components. But in real world they have parasitics and the equivalent circuit of an element can be quite complex. Each type of capacitor, for example have it's own equivalent circuit.

 

[unkarc]

Hi Indian,

There are many urls or textbooks dealing with your question.

Put the correct words into google.com search engine like (high frequency equivalent circuit resistance capacitor inductance) and go through some of the results.
See for instance http://www.analog.com/library/analogDialogue/Anniversary/21.html for caps and and http://www.dact.com/html/leaded_resistors.html for resistors and
http://www.consultrsr.com/resources/eis/induct1.htm for coils.

Regards
unkarc

 

[arunnandhakumar]

www.capacitor.org site would help you more

 

[Element_115]

R,L, and C's are modeled different for RF/Microwave Freq's.
Also a leaded (R,L,or C) of value "x" will be completely different
from a 0402 Surface Mount (R,L, or C) of value x!

See attached