A point source of microwaves produces pulses of frequency v = 20 GHz and of duration At = 1 ns. The source is placed in the focus of a conducting paraboloid with 2R = 20 cm so that a beam parallel to the paraboloid axis is obtained as output. The average power of each pulse is P = 25 kW. To calculate: • the A of microwaves; • the total energy of each pulse; • the intensity of the microwave beam; • the average energy density of each pulse; • the width of the field E and of the field B; • the force exerted during a pulse on a perfectly reflecting surface orthogonal to the beam. 37/40

A point source of microwaves produces pulses of frequency v = 20 GHz and of duration At = 1 ns. The source is placed in the focus of a conducting paraboloid with 2R = 20 cm so that a beam parallel to the paraboloid axis is obtained as output. The average power of each pulse is P = 25 kW. To calculate: • the A of microwaves; • the total energy of each pulse; • the intensity of the microwave beam; • the average energy density of each pulse; • the width of the field E and of the field B; • the force exerted during a pulse on a perfectly reflecting surface orthogonal to the beam. 37/40