Weather radar is about power, not the wave.
Care to explain?
All radars are fairly powerful devices. All RF energy falls off at the square of the distance. Which means required TX power in non- linear (why log db scales are frequently used).
To be useful in aviation, especially in faster aircraft, it must be able to put enough power into a wave which can travel 40-500 miles, round trip. This includes though atmospheric conditions such attenuate and disperse the signal, which prevents a reflected return.
Like comparing a shotgun with a nerfed gun.
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