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Microwaves are extensively used in modern technology, for example in point-to-point communication hyperlinks, wireless networks, microwave radio relay networks, radar, satellite tv for pc and spacecraft communication, medical diathermy and most cancers treatment, distant sensing, radio astronomy, particle accelerators, spectroscopy, industrial heating, collision avoidance methods, garage door openers and keyless entry systems, and for cooking food in microwave ovens.

Microwaves are utilized in spacecraft communication, and much of the world's data, Tv, and phone communications are transmitted long distances by microwaves between floor stations and communications satellites. Due to the excessive cost and maintenance necessities of waveguide runs, in many microwave antennas the output stage of the transmitter or the RF front finish of the receiver is located on the antenna. Another directive antenna practical at microwave frequencies is the phased array, 78 win a computer-managed array of antennas that produces a beam that may be electronically steered in several directions.

In a microwave beam directed at an angle into the sky, a small quantity of the power can be randomly scattered as the beam passes by the troposphere.