By combining a pair of low-noise FETs (2SK147) with a chopper-stabilized amplifier, this circuit has just 0.05 microV/deg.C of drift and less than 50 nV of noise in the 0.1 to 10-Hz band.
In this comprehensive application note, we delve into the methods of measuring the transmission (or reception) pattern, a key determinant of antenna gain, using a vector network...
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