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<p>Since the <a href="page.php?w=wavelength">wavelength</a>s of UHF waves are comparable to the size of buildings, trees, vehicles and other common objects, reflection and <a href="page.php?w=Knife-edge_effect">diffraction</a> from these objects can cause <a href="page.php?w=fading">fading</a> due to <a href="page.php?w=multipath_propagation">multipath propagation</a>, especially in built-up urban areas. Atmospheric moisture reduces, or <a href="page.php?w=Attenuation">attenuates</a>, the strength of UHF signals over long distances, and the attenuation</p><p>
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<a accesskey="3" href="page.php?w=ultra_high_frequency&amp;p=6">3.Next</a>
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