Crosspolarisation measurements using a composite feed with parasitic elements

Crosspolarisation measurements using a composite feed with parasitic elements

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Measurements using a composite primary feed with parasitic auxiliary elements reveal that both the copolar and crosspolar performances of this feed are better than those of the similar feed employing derived elements. An improvement of 10 dB in the crosspolar peak over that of the single dipole feed was obtained. An increase in antenna gain of about 3.3 dB was measured with a 3 dB suppression in sidelobe level.


    1. 1)
      • Ghobrial, S.I.: `A suggested feed for the reduction of crosspolarisation in reflector antennas', Report 145, .
    2. 2)
      • S.I. Ghobrial . Some data for the design of low crosspolarisation feeds. Electron. Lett. , 465 - 466
    3. 3)
      • S.I. Ghobrial , A.R. Obeid , F. Nakhla . Crosspolarisation measurements using a composite feed. Electron. Lett. , 85 - 86
    4. 4)
      • Ghobrial, S.I.: `Crosspolarisation properties of reflector antennas fed by a composite feed', Fifth Iranian Conference on Electrical Engineering, 1975, Shiraz, Iraq.

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