I think a more curious question is why in the world would you need 100nH at 10GHz? The reactance alone would be 6283 ohms and it would only take 253 fF of capacitance to resonate with the inductor.

The parasitic capacitance of a discrete component or even the board capacitance would make such an inductance value impractical.

A more practical way of thinking about the problem is to calculate the minimum inductance necessary to act as a choke for a particular circuit operating at a particular frequency. You can use the order of magnitude difference method as a way to approximate a value.

Hi RFICDUDE and L_E,

Thank you for your input. So you guys have a good point that a 100nH inductor is pretty much useless at 10GHz.

But what about at lower frequencies say 1GHz? Are there applications that could use a high quality inductor with large Q's, and costs about the same (or less) as currently available discretes (obviously such an inductor could replace current discretes)?

One example of an application could be that a inductor with several 100n of inductance can be used to make a narrow bandpass filter that could potentially be used in place of a saw filter in select applications.

Go get an accurate model of the inductors of interest - You will quickly find that the parasitics will make it a pointless exercise.

Need to look at the complete RLC network that you are thinking about. It does not look like a simple inductor.