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GATE EC 2016 Set 1 — Question 63

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NAT+2 / -0HardGain, Directivity & Radiation ResistanceAntennasElectromagneticsEffective Aperture

Electromagnetics → Antennas → Effective Aperture

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Two lossless X-band horn antennas are separated by a distance of 200λ200\lambda. The amplitude reflection coefficients at the terminals of the transmitting and receiving antennas are 0.150.15 and 0.180.18, respectively. The maximum directivities of the transmitting and receiving antennas (over the isotropic antenna) are 18 dB18\text{ dB} and 22 dB22\text{ dB}, respectively. Assuming that the input power in the lossless transmission line connected to the antenna is 2 W2\text{ W}, and that the antennas are perfectly aligned and polarization matched, the power (in mW) delivered to the load at the receiver is ________
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