Antenna element to element RMS amplitude
时间：04-09
整理：3721RD
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Hi,
I'm doing a course measurement of amplitude using a loop probe and a vector network analyser. I measure the S21 amplitude and want the relative element to element RMS amplitude. Do I need to convert these numbers to "voltage"? If it has to be voltage why?
Vn = v1/v2 = 10^(dB/20) ?
Then use
RMS = √(Σ(Vavg-Vn)2)/N) Another fellow gets this number and normalizes this and I'm not certain why... He doesn't use voltages..
Can this be done just using dB?
Can it be done using just amplitude ratio? =10^(dB/10) ?
Thanks for the help -
I'm doing a course measurement of amplitude using a loop probe and a vector network analyser. I measure the S21 amplitude and want the relative element to element RMS amplitude. Do I need to convert these numbers to "voltage"? If it has to be voltage why?
Vn = v1/v2 = 10^(dB/20) ?
Then use
RMS = √(Σ(Vavg-Vn)2)/N) Another fellow gets this number and normalizes this and I'm not certain why... He doesn't use voltages..
Can this be done just using dB?
Can it be done using just amplitude ratio? =10^(dB/10) ?
Thanks for the help -
Is there any help out there?