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Unformatted text preview: Problem 3 An X-band (8.2 12.4 GHz) rectangular horn antenna has physical aperture A phy with dimensions of 5.5 cm (height) by 7.4 cm (width). Determine its effective aperture A eff (in cm 2 ) and its aperture efficiency e a at 8.2 GHz and 12.4 GHz if the directivity D is (a) 14.8 dB at 8.2 GHz (b) 18.0 dB at 12.4 GHz. Problem 4 A circularly polarized wave, traveling in the + z-direction, is received by an antenna whose transmitted far-field is elliptically polarized along the direction of the incoming wave. This latter transmitted field can be expressed in the following form E = ) , , ( ) 2 ( r f y j x Find the polarization loss factor in dB when the incident wave is (a) right-hand circularly polarized (RHCP), and (b) left-hand circularly polarized (LHCP)....
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This note was uploaded on 10/21/2010 for the course ECE 613 taught by Professor Teixeira during the Fall '10 term at Ohio State.
- Fall '10