An ablation system for directing energy to a target volume of tissue isprovided. Theablation system comprises an ablation antenna probe including at least oneradiating portionconfigured to output electromagnetic radiation and at least oneelectromagnetic shieldingreflector configured for removable positioning on the antenna probe. The atleast oneelectromagnetic shielding reflector is configured to block electromagneticradiation from theat least one radiating portion through the at least one electromagneticshielding reflector suchthat a particular directionality of the electromagnetic radiation from the atleast one radiationportion to a target volume of tissue is achieved.
