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・ Thermichthys hollisi
・ Thermidarctia
・ Thermidarctia thermidoides
・ Thermidarctia thirmida
・ Thermidava
・ Thermidor
・ Thermidor (disambiguation)
・ Thermal energy storage
・ Thermal engineering
・ Thermal entrance length
・ Thermal equator
・ Thermal equilibrium
・ Thermal expansion
・ Thermal expansion coefficients of the elements (data page)
・ Thermal expansion valve
Thermal fade
・ Thermal fluctuations
・ Thermal fluids
・ Thermal fracturing in glass
・ Thermal grease
・ Thermal grill illusion
・ Thermal Hall effect
・ Thermal Head
・ Thermal history coating
・ Thermal history modelling
・ Thermal history of the Earth
・ Thermal hydraulics
・ Thermal hydrolysis
・ Thermal imaging camera (firefighting)
・ Thermal immersion circulator


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Thermal fade : ウィキペディア英語版
Thermal fade

A thermal fade is a phenomenon of wireless signal degradation (fading) caused by temperature and relative humidity factors. As the prevailing environmental conditions change, for example, from hot to cool, humid to arid or day to night, the electromagnetic waves refract differently thus altering the power distribution and possibly the direction of the signal. This is the same process that causes visible light to "bend" on hot days over a road or other surfaces.
This is a serious problem for AM broadcasting but less so with FM broadcasting. Thermal fading can occur in almost any frequency band.
==See also==

*Atmospheric duct
*Refractive index

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Thermal fade」の詳細全文を読む



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