Download correlation between the flicker and the microwave noise of gallium

TOBIAS WERNER
CORRELATION BETWEEN THE FLICKER AND THE MICROWAVE NOISE OF GAN HFETS
a)
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b)
Fig. 4.4: (a) Typical result of a S-parameter measurement obtained with the aid of a
(b) vector network analyzer (Hewlett Packard HP8150C).
A tuner controller MT966B02 from Maury Microwave manages two mechanical tuners
MT982A01 (Fig. 4.5) from the same company at the source and load position. Tuners are
used to change the impedance, seen by the DUT at its input and output and are set to
50 Ohms during the S-parameter measurement.
Fig. 4.5: Picture of two mechanical tuners (MT982A01) with
a tuner controller (MT966B02) of Maury Microwave.
Two very-high-temperature probes VHT40A-GSG-150P (Fig. 4.6a) of GGB Industries5,
with ground-signal-ground configuration and 150 µm contact spacing, are used to contact
transistors on-waver.
5
GGB Industries, 4196 Corporate Square, Naples, FL 34104, USA,
Phone: +1(941) 643-4400, Fax: +1(941) 643-4403, www.ggb.com