Abstract #4279

Hybrid Pair Ratio Adjustable Power Splitter using off-shelf components and easy-to-replace microstrip phase shifter

Yue Zhu^1,2, William A Grissom^1,2,3,4, John C Gore^1,2,3,4, and Xinqiang Yan^1,2

¹Vanderbilt University Institute of Imaging Science, Nashville, TN, United States, ²Department of Radiology and Radiological Sciences, Vanderbilt University, Nashville, TN, United States, ³Biomedical Engineering, Vanderbilt University, Nashville, TN, United States, ⁴Electrical and Computer Engineering, Vanderbilt University, Nashville, TN, United States

A low loss ratio adjustable power splitter (RAPS) was designed with a Wilkinson Splitter, a pair of transmission lines, and a hybrid coupler. There are some potential issues with the previous RAPS: 1. Build a high-performance RAPS circuit with lumped elements is challenging and laborious at 298 MHz. 2. The 100-Ohm RF decoupling resistor poses a safety hazard to the patient. In this abstract, the Wilkinson splitter was replaced with a hybrid coupler, and the adjustable transmission lines are replaced with printed microstrip lines to mitigate the problems mentioned above.

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