Contents
What is RF inductor?
RF inductors are special inductors designed to be used in radio frequency (RF) and microwave applications. RF inductors are inductors designed to handle radio frequency signals, which are much higher in frequency than alternating or direct (AC or DC) current.
What does a RF choke do?
An RF choke is an inductor that blocks all High Frequency RF Signals and only allows DC Signals to pass through it.
How does an inductor act at high frequencies?
As the frequency increases, the impedance of the inductor increases while the impedance of the parasitic capacitor decreases, so at some high frequency the impedance of the capacitor is much lower than the impedance of the inductor, which means that your inductor behaves like a capacitor.
What do the dots mean on a RF inductor?
The dot is for identification only and does not indicate polarity. Other parts are marked with three color dots. The dots do not indicate polarity. The table below shows the significance of each color. Dots 1 and 2 indicate the inductance in nanoHenries. Dot 3 indicates the number of zeroes to be added.
What are the different types of RF inductors?
RF Inductors – Color Coding 0201, 0302, 0402, 0403 and 0603 Series Because of their small size, 0201, 0302, 0402, 0403 and some 0603 parts are not marked. 0603, 0805 and 1008 Series
How are inductors coded according to their size?
Some inductors consist of color dots on surface of the device instead of bands and these are very small in size. Generally these are coded according to the top colored dot on the surface. From this top dot we have to calculate the inductor value in clockwise direction.
How many parts are in a 0603 inductor?
Because of their small size, 0201, 0302, 0402, 0403 and some 0603 parts are not marked. 0603 (except 0603CT), 0805 (except 0805HP), and some 1008 parts are marked with a single color dot.