Question

An antenna is placed in a dielectric medium of dielectric constant $6.25$. If the maximum size of that antenna is $5.0$ $mm$, it can radiate a signal of minimum frequency of __________GHz. (Given $μr$ = $1$ for dielectric medium)

Answer 1

We know that $v = fλ$

Putting the values,

$\frac{3 \times 10^8}{\sqrt{6.25}} = f \times 20\times 10^{-3}$

$⇒ f = 6 \times 10^9 Hz$