An Air Coil Inductor is a coreless inductor crafted by precisely winding conductive wire (e.g., copper or aluminum) into helical or spiral forms, eliminating magnetic cores to deliver ultra-low loss, high Q factor, and minimal distortion in high-frequency applications (MHz to GHz). Ideal for RF circuits, tunable filters, and resonant systems, its absence of core saturation ensures stable inductance under varying currents, while temperature-insensitive performance suits aerospace, medical imaging, and precision instrumentation. Available in fixed or adjustable configurations, it balances compact design with customizable inductance (nH to mH) for noise-sensitive, high-speed signal processing.