System for measuring the power of a microwave beam

A system for measuring the power of a microwave beam comprising:

• a waveguide for guiding a microwave beam whose power is to be measured,
• a preload coupled to the waveguide,
• a load coupled to the preload, wherein said load has an internally hollow spherical shape with an opening and an inner surface coated with an absorbing coating suitable for absorbing microwaves,
• a diffusing mirror with convex shape, disposed inside the load in a diametrically opposite position with respect to the opening of the load to reflect the microwave beam on the absorbing coating of the load,
• cooling conduits that contain water lapping against the load,
• a thermometer disposed in the cooling conduits to measure the temperature of the water lapping against the load,
• calculation means configured to calculate the power of the microwave beam based on a temperature increase of the water lapping against the load measured by said thermometer;
• wherein said preload comprises a deviation box comprising a beam deviator suitably configured to permit a deviation of a microwave beam exiting the deviation box relative to a microwave beam entering the deviation box;
• wherein said beam deviator of the deviation box comprises a concentrating mirror which is concave and is shaped like a portion of paraboloid;
• the concentrating mirror being suitable for reflecting the microwave beam whose power is to be measured, in such a way to obtain a reflected beam;
• wherein the concentrating mirror generates a collimation of the reflected beam that is converged towards a point of convergence inside the load;
• the point of convergence coinciding with the focus of the paraboloid.