A multicarrier ablation system comprising: an antenna for application to biological tissue； a multi-carrier signal generator configured to provide a forward radio frequency (RF) signal to the antenna, the forward RF signal comprising multiple subcarriers that occupy respective frequencies within a bandwidth of the RF signal； and a monitoring circuit configured to receive a reflected RF signal from the antenna and control the multi-carrier signal generator to adjust one or more parameters of the forward RF signal during an ablation procedure based on the reflected RF signal.
