Answer
$2.27m$
Work Step by Step
We can find the required length of the antenna as follows:
$L=\frac{1}{2}\lambda=\frac{c}{2f}$
We plug in the known values to obtain:
$L=\frac{3.00\times 10^8}{2(6.60\times 10^7)}$
$L=2.27m$
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