289. Why is coaxial cable often used for S-band installations instead of a waveguide?

Losses can be kept reasonable at S-band frequencies and the installation cost is lower .
A waveguide will not support the power density required for modern S-band RADAR transmitters.
S-band waveguide flanges show too much leakage and are unsafe for use near personnel.
Dimensions for S-band waveguide do not permit a rugged enough installation for use by ships at sea.

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