Backfire/endfire radiation performance of quadrifilar helical antennas |
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| Authors: | Terada N Kagoshima K |
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| Affiliation: | NTT Radio Commun. Syst. Lab., Take Yokosuka Kanagawa, Japan; |
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| Abstract: | The relations between the radiation pattern and feeding method in quadrifilar helical antennas is discussed. As a result, it is found that by changing the phase of each wire the helical antenna can achieve two radiation modes; both backfire and endfire radiation. These patterns do not have a difference except in radiation direction. Antenna polarisation of quadrifilar helical antenna depends only on the helical winding direction.<> |
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