from one of my earlier posts heres the basics of what cebik said when i asked him about the sigma style antenna,
lb cebik ( rip ) told me there was more going on with that design than is immediately apparent to most people,
i fully explained what i was doing and what the results were,
he said that in the real world of earth masts and feedlines as opposed to freespace models, the radial angle makes little practical difference to the angle of radiation, that is untill we fold the radials up towards the radiator,
then a none aparent colinear array is possiblle that will outperform any conventional groundplane,
he said my test results were very much possible but was reluctant to get involved with the pages of meaningless arguments that such misunderstood antennas can generate,
look at transmissionline mode and antenna mode currents in a j-pole,
look at transmissionline mode and antenna mode currents in a gamma fed antenna,
look at transmissionline mode and antenna mode currents in an open sleeve antenna with different sleeve to monopole length ratios,
i cannot say with 100% confidence how the sigma operates but the common j-pole is not the answer,
