Seminars
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Title: “Seminar on Recent Advances in Passive and Active Load Pull by Maury Microwave”
Presented by: Gary Simpson Abstract - Time: Sunday afternoon (April 15) from 1:30 to 4:30 PM.
Seminar on Recent Advances in Passive and Active Load Pull by Maury Microwave
Gary Simpson:
In today’s modern RF world, it is common knowledge that the use of
impedance matching networks on the input and output of a
transistor in order to maximize power transfer, output power,
gain, efficiency and/or linearity is critical. Automated load
pull based on slide-screw tuners was first introduced in 1987 in
order to help engineers determine these proper matching
networks. This method of load pull, which is still used in
industry today, relied on mechanical tuners to vary the source
and load impedances presented to a device-under-test. Since
then, load pull has gone through several evolutions including
the progression from fundamental-only impedance control to
harmonic load pull, from scalar power meter-based measurements
to vector-receiver real-time load pull, and from purely passive
mechanical systems to open loop active, hybrid-active and
mixed-signal active load pull systems. This seminar introduces
and compares the various methodologies, including measurement
results, and is meant to assist engineers in their understanding
of and decision-making process towards 21st century load pull
systems.