What is the difference between microwaves used for communication and that used by microwave ovens?

Question

Explain me with technical details

Answer 1

There is also the issue of power levels

Household microwave ovens are 1 kW or so

Big commuincation arrays are 10's of that, actually quite dangerous to stand in front of

Answer 2

At the fundamental level, nothing. In fact, microwave ovens use 2.4GHz and so share the spectrum with 802.11b/g/n.

At the higher level, it's the power level and how the waves are modulated and directed or contained. It's a bit like the difference between using water to put out a fire vs. watering your garden: the oven is high power and concentrated microwave energy, while your wi-fi access point is low power and broadcast energy.

Answer 3

The latter is confined to the inside of the oven, is fixed frequency with no modulation.

The first is sent between microwave antennae, is of any of a number of frequencies, and is modulated by various methods, and carries lots of information.

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