The invention relates to a communication device including a power amplifier for amplifying a modulated high frequency carrier signal comprising a resonance circuit arranged between resonance circuit input means and antenna means. To improve the power added efficiency of the power amplifier, the resonance circuit input means is provided with an excitation circuit for supplying an excitation signal to the resonance circuit phase and/or frequency coupled with the modulated high frequency carrier signal and having a duty cycle significantly less than 50 %.