Abstract #3119
Evaluation of a modified passive clamp decoupling network at high frequencies
Chathura Kumaragamage 1,2 and Jamie Near 2,3
1
Biomedical Engineering, McGill University,
Montreal, Quebec, Canada,
2
The
Douglas Brain Imaging Centre, Montreal, Quebec, Canada,
3
McGill
University, Montreal, Quebec, Canada
The efficacy of receiver coils decoupling, using
clamping diodes on the Tx-line is investigated. We found
that signal transmission (S21) is degraded due to
impedance mismatching at high frequencies, when simple
cross diode shunting is used along the Tx-Line (~8%
power loss at 600MHz). A cross diode topology with an
added tank circuit was found to improve S21 (~2% power
loss at 600MHz). The modified cross diode topology
provides an efficient solution for passive decoupling at
high-frequencies that is remote to the coil, thus
providing a convenient and safe alternative to passive
decoupling networks mounted on the receiver coil
element.
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