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G9A07

What must be done to prevent standing waves on an antenna feed line?

Select	Answer
A	The antenna feed point must be at DC ground potential
B	The feed line must be cut to a length equal to an odd number of electrical quarter wavelengths
C	The feed line must be cut to a length equal to an even number of physical half wavelengths
D	The antenna feed point impedance must be matched to the characteristic impedance of the feed line

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