Radiotherapy apparatus

A radiotherapy apparatus comprising:

• an irradiation head having a linear accelerator and an intra-head waveguide unit whose one end portion is electromagnetically connected to the linear accelerator;
• a supporting moving mechanism which supports and moves the irradiation head on predetermined first spherical coordinates;
• a microwave oscillator which generates microwaves to be supplied to the irradiation head, and which is placed in a stationary position;
• a fixed waveguide unit having one end portion electromagnetically connected to the microwave oscillator, and the other end portion positioned on the supporting moving mechanism;
• and
• a moving waveguide unit having one end portion electromagnetically connected to the other end portion of the fixed waveguide unit positioned on the supporting moving mechanism, and the other end portion electromagnetically connected to the other end portion of the intra-head waveguide unit.