NFC Antenna Designer

This tool provides a domain-focused workspace to model NFC antenna coils for 13.56 MHz. It accepts coil geometry inputs (outer/inner diameter, turns, trace width, and spacing) and dielectric assumptions, then computes inductance, required capacitance for resonance, and approximate impedance. It is intended for RF engineers, PCB designers, and product developers who need rapid design iteration without hardware prototyping.
Core calculations use standard inductance formulas for air-core coils (Wheeler, Nagaoka variants) and simple capacitance estimates. The tool applies 1/(2π√(LC)) for resonance frequency and outputs tolerance ranges based on default material constants. It supports multiple geometries (circular, rectangular) and optional ferrite or dielectric loading.
Outputs can be exported as a report or data table for prototyping and documentation. It includes guidance on acceptable tolerances, common pitfalls (parasitic capacitance, mounting, ferrite shielding), and how to adjust geometry to meet a target frequency and impedance. It does not replace full electromagnetic simulation but accelerates concept verification.
Assumptions & limitations: results are estimates; real-world measurements depend on mounting, substrate, and environment. The tool is aligned with NFC-related standards and uses SI units typical in the RF domain.