Radio frequency system and method for limiting a voltage

A radio frequency system with a first antenna terminal, a second antenna terminal, a radio frequency transceiver coupled to the first and the second antenna terminal, a rectifier connected to the first and the second antenna terminal at its input side and a voltage limiter connected to the first and the second antenna terminal at its input side, the voltage limiter comprising

• a first input terminal connected to the first antenna terminal;
• a second input terminal connected to the second antenna terminal;
• a first diode element connected between the first input terminal and a bias terminal;
• a second diode element connected between the second input terminal and the bias terminal;
• a regulation transistor connected between the bias terminal and a reference potential terminal;
• and
• a voltage controller with a reference input for receiving a reference signal, with a feedback input connected to the bias terminal and with a control output for providing a control potential to a control terminal of the regulation transistor on the basis of the reference signal and a signal at the bias terminal.