A winding type or multi-layer type coil is suitable since large current flows through the coil.
Winding
Multilayer
The matching coil should be a high-Q type or tight inductance tolerance type coil for stable oscillation and signal quality.
A winding type coil is suitable if high Q characteristics are required. A film type coil is suitable if tight inductance tolerance is required.
Film
Winding
Multilayer
Application Examples of Cellular Phone
