High Quality-Factor Planar Inductors Compatible with Flexible Large-Area Electronics for Integrated IoT and 5G/6G Applications

Resonant operation, exploiting high quality-factor planar inductors, has recently enabled giga-Hertz applications in large-area electronics, opening up a new technology platform for large-scale and flexible wireless systems. This work presents the design, analysis, and characterization methodology of flex-compatible large-area planar inductors with a record-high quality factor of up to 65 in the 2.4-GHz frequency band. The inductor design and analysis address a key frequency limiter to recently demonstrated large-area and conformal wireless systems for integrated Internet of Things and 5G/6G applications.