Question

A transmitting antenna has the normalized radiation pattern shown below.The pattern is rotationally symmetric, meaning that there is no -dependence. The antenna has a directivity of 11 dBi and an efficiency of 94%. The transmitter feeding the antenna has an output power of 1.5 W. The system operates at a frequency of 11 GHz.The transmission line between the transmitter and antenna introduces a loss of 5 dB. (a) The receiving station is 20 km away, and it is initially located at theta = 0°. What is the power density (in W/m²) produced in the vicinity of the receiving station? (b) The receiving antenna now moves. It is still 20 km away, but it is now at theta = 36º.What is the power density (in W/m²) produced in the vicinity of the receiving station at its new location?

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