Question

A 30-dB, right-circularly polarized antenna in a radio link radiates 5 W of power at 2 GHz. The
receiving antenna has an impedance mismatch at its terminals, which leads to a VSWR of 2. The
receiving antenna is about 95% efficient and has a field pattern near the beam maximum given
by E⃗
? = (2?̂ + ??̂)??(?, ∅). The distance between the two antennas is 4000 km, and the receiving
antenna is required to deliver 10-14 W to the receiver. Determine the maximum effective aperture
of the receiving antenna.

Answer 1