Yue Zhu1,2 and Xinqiang Yan1,2
1Vanderbilt University Institute of Imaging Science, Nashville, TN, United States, 2Department of Radiology and Radiological Sciences, Vanderbilt University, Nashville, TN, United States
1Vanderbilt University Institute of Imaging Science, Nashville, TN, United States, 2Department of Radiology and Radiological Sciences, Vanderbilt University, Nashville, TN, United States
A
dual band Lattice balun was proposed to remove common mode current for both frequencies in dual-tuned MRI coils with a single
interfacing unit. In
this work, we analyzed how each lumped element will affect this device's performance
and optimized the circuit performance based on the analysis.
Figure 1. Diagram of
the dual tuned balun and approximations for different nuclei. The dual-band balun
approximates two different single-band baluns at different frequencies, making
it suitable for dual-band detection systems.
Figure 5. Common
mode rejection ratio test with current probes. The CMRR shows a good rejection
ratio at sodium and proton frequencies. The two current probes are connected to
the VNA while the ground of the two cables from the balun circuit connects to a
large resistor.
