Measuring Qs above 200

[jf1020]

Does anyone know of a test specializes in Testing Q of custom size caps and inductors?

thanks

 

[vfone]

Most of impedance and component analyzers from Agilent have the possibility measuring custom LC components:

http://www.home.agilent.com/en/pc-1000000382:epsg:pgr/impedance-analyzers?nid=-33831.0&cc=RO&lc=eng

 

[chuckey]

If you resonate your component, feed it RF from a generator via a high impedance coupling (small capacitor?) and then measure the voltage across the circuit, normalise it to 1 at the maximum output, measure the frequency of the generator at the -3dB points (.7071 Vmax). The centre frequency/change of frequency (+ -> -) is the Q. Do the calculations, then re-calculate for the output impedance of the generator and input impedance of the voltmeter (CRO?). Repeat at different frequencies?
Frank