Application
The dual-loop probe is made using multilayer PCB technology and used with a VNA to measure the tuning frequency and quality factor of RF coils and associated electronics.
Contributors
Nicola De Zanche1
Giulio Giovannetti2
Estimated cost
3€
Progress
CERN-OHL-W 2.0, CC-BY-ND 4.0
Dual-loop RF probe is an open-source design for a dual-loop magnetic-field (H-field) probe implemented on a 4-layer PCB, with two decoupled loops routed on the internal layers and ground planes on the outer layers, providing a compact, rugged, and reproducible alternative to fragile hand-built coaxial loop probes. The probe offers high isolation (typically >50 dB up to 500 MHz and ~38 dB up to 1 GHz) and is inexpensive to produce (around 3 USD for the PCB and connectors), enabling reliable, consistent measurement of resonant frequency and quality factor (Q) of RF coils without the need for specialized fabrication techniques.
Publications
Affiliations
1Oncology, University of Alberta, Edmonton, AB, Canada; Medical Physics, Cross Cancer Institute, Edmonton, AB, Canada
2Institute of Clinical Physiology, National Research Council (CNR-IFC), Pisa, Italy