NFC Transmission Line Width Taper for Impedance Matching

The transmission line is designed with different width sections (first width section, second width section, third width section) where each section has a specific width optimized for its function. The first width section matches the operating circuit, the second width section (with maximum width) matches the antenna, and the third width section provides transition. This local differentiation of geometric properties creates continuous impedance matching along the transmission path, eliminating reflection and reducing signal loss without requiring complex external matching components.

The transmission line width is made dynamic rather than uniform, varying continuously through different sections to optimize performance at different locations. The width transitions from a first width at the operating circuit connection to a maximum second width at the antenna connection, then to a third width. This dynamic geometric adaptation allows the line to provide optimal impedance matching and signal transmission while confining the increased width to only the necessary central portion, minimizing overall area occupation compared to a uniformly wide transmission line.