The efficiency of an antenna increases with its size. Ideally, an antenna should...
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The efficiency of an antenna increases with its size. Ideally, an antenna should be several wavelengths in size. An antenna much smaller than a wavelength will be very inefficient, and will radiate only a small fraction of the power applied to it.A frequency that mobile phones operate at is 900MHz. What wavelengths do these correspond to? Give your answer to two significant figures in cm.
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