A baseband signal of 3 . 5 MHz frequency is modulated with a carrier signal of 3 . 5 GHz frequency using amplitude modulation method. What should be the minimum size of antenna required to transmit the modulated signal ?

Step-by-step solution

The wavelength of the carrier wave is, λ c = c ν c = 3 × 10 8 3 . 5 × 10 9 = 3 35   m . The minimum size of the antenna required is 1 4 t h of the wavelength of the carrier. Therefore, l = 1 4 × 3 35 = 21 . 4   mm