A lossless circular aperture antenna has a gain of 15 dB and overall physical area of 25 cm^2. The frequency of operation is 10 GHz.
(a) What is the aperture efficiency of the antenna (in %)?
(b) What is the power PL delivered to a matched load given that the power density of the incident wave at the antenna aperture is 30 mW/cm^2? Assume ideal conditions (no losses).
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