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The 5/8 wave antenna doesn't have enough inverted radiation currents at the base of the vertical whip to make the 40 degree secondary lobe stronger then the lower primary lobe.

Therforefore it is not a benefit to sweep the radials upward. As the vertical radiator gets to 3/4 or 7/8 wave the inverted base currents are much stronger. Unless the radials sweep upwards like the Sigma, those currents make a huge 40 degree lobe.

[QUOTE="Shockwave, post: 385015, member: 10882"] The 5/8 wave antenna doesn't have enough inverted radiation currents at the base of the vertical whip to make the 40 degree secondary lobe stronger then the lower primary lobe. Therforefore it is not a benefit to sweep the radials upward. As the vertical radiator gets to 3/4 or 7/8 wave the inverted base currents are much stronger. Unless the radials sweep upwards like the Sigma, those currents make a huge 40 degree lobe. [/QUOTE]

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