8. A space-borne antenna can be designed so that it has one major lobe in the upper hemisphere and negligible minor lobes in all spatial directions. Its major lobe radiation intensity can be...

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Extracted text: 8. A space-borne antenna can be designed so that it has one major lobe in the upper hemisphere and negligible minor lobes in all spatial directions. Its major lobe radiation intensity can be approximated by, U (0, 4) = U, cos" e (0 <>< 27,=""><><) where="" n="" is="" a="" design="" parameter="" (not="" necessarily="" an="" integer).="" detemine:="" the="" value="" of="" n="" to="" three="" decimal="" points,="" corresponding="" to="" a="" main="" lobe="" half="" power="" beamwidth="" of="" 5="" degrees.="" the="" exact="" maximum="" directivity="" of="" this="" antenna="" in="" dbi.="" (a)="">