difference between spiral inductors with ground plane and that without?

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m.n.h

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hi

can any one explain what is the difference between spiral inductors with ground plane and that without? (hint: i DONT mean that ground plane is patterned ground shield)
 

Any object close to a spiral inductor will affect it. If the object is conductive, the inductor field will generate eddy currents in it. A good conductor will change the inductance value, a poor conductor will affect its resistance.
 

jiripolivka said:
Any object close to a spiral inductor will affect it. If the object is conductive, the inductor field will generate eddy currents in it. A good conductor will change the inductance value, a poor conductor will affect its resistance.
Click to expand...

So then i can use it with or without ground plane??
 

m.n.h said:
So then i can use it with or without ground plane??
Click to expand...


Adding a solid ground plane underneath the inductor will have very negative effect on the performance of the inductor (inductance and Q factor).
 

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