Abstract #1776
7T Coil Decoupling in Near-Magnet Power Amplifier
Ashraf Abuelhaija 1 and Klaus Solbach 2
1
Duisburg-Essen University, Duisburg, Select
a state, Germany,
2
Duisburg-Essen
University, Duisburg, Germany
For Tx arrays, the concept of mismatched termination of
coils by power amplifiers (PA) for coil isolation has
been proposed. This contribution presents an
investigation by using the output impedance of a 1 kW
power amplifier which was designed for a 7 Tesla 32
channel near-magnet Tx array. Isolation performance is
proven by a measurement using a pair of decoupled
pick-up coils and EM simulations of coupled coils
terminated by the PA output impedance as well as of the
PA large-signal reflection coefficients as function of
output power or (coupled) reverse power.
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