what is a high frequency air core transformer?

A high-frequency air core transformer is a type of transformer that operates efficiently at elevated frequencies, typically above 20 kHz. Unlike traditional transformers that use a magnetic core, it relies on air as the core material, which minimizes losses due to eddy currents and hysteresis. This design is ideal for applications such as RF (radio frequency) circuits and induction heating, where low weight and high efficiency are crucial.