How to calculate Microwave Power

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SUMMARY

This discussion focuses on calculating microwave power generated by a magnetron. To determine the power in watts, one must measure the amplitude of the microwaves and their effect on a medium, such as water. A practical method involves heating water in a large glass container for a set duration, measuring the temperature change, and calculating the energy absorbed to estimate average power. Additionally, specifications of the magnetron or microwave can provide a rough estimate of power output.

PREREQUISITES
  • Understanding of microwave frequency and magnetron specifications
  • Knowledge of thermodynamics, specifically heat transfer and temperature measurement
  • Familiarity with basic electrical engineering concepts related to wave amplitude
  • Experience with experimental setups for measuring energy absorption
NEXT STEPS
  • Research methods for measuring microwave power using calorimetry
  • Learn about the relationship between wave amplitude and power in electromagnetic waves
  • Explore specifications and performance characteristics of various magnetrons
  • Investigate the principles of wave interference and its effects on electric fields
USEFUL FOR

Engineers, physicists, and technicians involved in microwave technology, as well as anyone interested in practical applications of microwave power measurement.

CL39
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-If you have a magnetron produce __# of microwaves, each with frequency
of __ MHz, how can one calculate the power of those microwaves (in watts)?


-the microwaves have electric field and magnetic field associated with
them, taking just one microwave (in the waveguide) and its associated electric field,
if you had another microwave in phase, does the electric field
simply double?


Thank you.
 
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You need to know the amplitudes of the waves to calculate the power. You could easily measure the power delivered though. Have a large, large mouthed glass container with water at room temperature. Heat it for a specific amount of time in the microwave, measure the temperature difference, calculate the amount of energy absorbed and use the time to find the average power absorbed. You could get a ballpark estimate by looking up the specs of the magnetron or the microwave itself.
 

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