Abstract #0704
Custom MEMS Switch for MR Surface Coil decoupling
Dan Spence 1 and Marco Aimi 2
1
GE Healthcare, Waukesha, Wisconsin, United
States,
2
GE
Global Research, Niskayuna, New York, United States
A custom MEMS (Micro Electro Mechanical System) switch
has been developed to operate in an MR environment. This
new switch greatly reduces the power dissipation and
simplifies the decoupling design for RF coils. With a
standoff voltage greater than 500V, a high isolation
impedance, and small resistance, the new switch can
directly replace the pin diode tank circuits used in MR
coils. The unique features of this switch will enable
the simplification of coils as they move to higher
densities. Apart from decoupling, other uses of the
switch include channel routing, dynamic tuning, T/R
switch, and transmit coil applications.
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