Microwave heating apparatus

A microwave heating apparatus comprising:

• a magnetron;
• a circulator having a front end connected to the magnetron;
• a heating assembly having
• a base waveguide tube having
• an inlet port formed in a front end of the base waveguide tube, and the front end of the base waveguide tube connected with a rear end of the circulator;
• and
• a connecting port formed in a rear end of the base waveguide tube, wherein the base waveguide tube has an imaginary axis defined through the front end of the base waveguide tube and the rear end of the base waveguide tube;
• and
• a guiding tube mounted through and securely mounted on the base waveguide tube and having an imaginary central line defined along an elongation direction of the guiding tube, wherein an included angle between the imaginary central line and the imaginary axis is smaller than 90 degrees;
• and
• an end assembly including
• a reflecting component movably mounted in the base waveguide tube, disposed between the guiding tube and the connecting port and having a reflecting surface, and the reflecting surface facing toward the guiding tube;
• and
• an adjusting module mounted on the rear end of the base waveguide tube, connected to the reflecting component, and selectively driving the reflecting component to adjust a distance defined between the reflecting component and the guiding tube.