Methods and devices for applying energy to bodily tissues

A medical device for applying a microwave energy from a microwave energy source, the medical device comprising:

• a transmission line having a shielding element;
• a microwave antenna configured to apply microwave energy to tissue, the antenna comprising a radiating member operatively coupled to the microwave energy source via the transmission line, an antenna dielectric and a shaping member electrically coupled to the shielding element, where the shaping member is electrically conductive;
• and
• where the radiating member comprises a first profile such that application of microwave energy by the radiating member alone produces a first microwave energy field, and where the shaping element comprises a second profile and is positioned to couple with the microwave energy field of the radiating member to shape the first unshaped microwave energy field into a second shaped microwave energy field extending volumetrically around the antenna.