Abstract: An ultrasound lens module and an ultrasound needle device are provided. The ultrasound needle device includes a transducer layer and the ultrasound lens module. The ultrasound lens module is disposed on the transducer layer to focus the ultrasound emitted from the transducer layer, in which the ultrasound lens module includes a metamaterial layer. The metamaterial layer includes a flat portion and a micro structure portion. The micro structure portion is located on a surface of the flat portion, in which the micro structure portion includes at least one intrusion structure. When the number of the at least one intrusion structure is one, the intrusion structure is disposed on the flat portion in a spiral shape. When the number of the at least one intrusion structure is greater than one, the intrusion structures are disposed on the flat portion in spiral shapes or in a shape of concentric circles.

Abstract: A microwave heating device includes a waveguide, a metal plate, a magnetron, a heat generating plate, a thermal insulation member and an adjusting member. The waveguide has a waveguide space, in which a sidewall of the waveguide has an opening communicating the waveguide space. The metal plate covers the opening to seal the waveguide space. The magnetron is configured to generate microwaves, in which an output end of the magnetron protrudes into the waveguide space. The heat generating plate is disposed in the waveguide space and is contacted with the metal plate, in which the heat generating plate is configured to absorb microwaves. The thermal insulation member is partially covers the heat generating plate. The adjusting member is disposed in the waveguide space and is located under the heat generating plate.