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Loop Antenna Polarization
On Sun, 21 Aug 2016 23:18:39 -0400, Ralph Mowery
wrote: In article ple.org, says... But, there is the case of loops with the area placed in parallel with the earth. Those are horizontally polarized. I'm suddenly blank about what they were called, but fifty years ago it wasn't uncommon to see such horizontal loops on cars, for 2M and 6M use, since this was before FM so "base" antennas were generally horizontally polarized. Michael They were called halos. They were horizontal polarized. If mounted a fraction of a wavelength over a conducting surface then they became DDRR antennas (directional discontinuity ring radiator)and vertical polarized. Don't forget Squalos (same as halos, but the loop was squared off). I have no idea why I remember that. Must have been advertised in QST. |
#3
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Loop Antenna Polarization
On Mon, 22 Aug 2016, Pat wrote:
On Sun, 21 Aug 2016 23:18:39 -0400, Ralph Mowery wrote: In article ple.org, says... But, there is the case of loops with the area placed in parallel with the earth. Those are horizontally polarized. I'm suddenly blank about what they were called, but fifty years ago it wasn't uncommon to see such horizontal loops on cars, for 2M and 6M use, since this was before FM so "base" antennas were generally horizontally polarized. Michael They were called halos. They were horizontal polarized. If mounted a fraction of a wavelength over a conducting surface then they became DDRR antennas (directional discontinuity ring radiator)and vertical polarized. Don't forget Squalos (same as halos, but the loop was squared off). I have no idea why I remember that. Must have been advertised in QST. It all came back in the middle of the night. I think the Squalo was a commercial antenna, from Hygain or whatever. But the halo was in the antenna books too, so you could build or buy. I still have a Saturn 6 in the basement, a stacked set of 3 halos. Michael |
#4
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Loop Antenna Polarization
In article ple.org,
says... It all came back in the middle of the night. I think the Squalo was a commercial antenna, from Hygain or whatever. But the halo was in the antenna books too, so you could build or buy. I still have a Saturn 6 in the basement, a stacked set of 3 halos. Michael If that is the antenna I remember, the halos are not really stacked,but it does loop around 3 times to make the full length of the antenna instead of being a couple of feet in diameter that a true 6 meter halo would be. --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus |
#5
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Loop Antenna Polarization
On Sun, 21 Aug 2016, Ralph Mowery wrote:
In article ple.org, says... But, there is the case of loops with the area placed in parallel with the earth. Those are horizontally polarized. I'm suddenly blank about what they were called, but fifty years ago it wasn't uncommon to see such horizontal loops on cars, for 2M and 6M use, since this was before FM so "base" antennas were generally horizontally polarized. Michael They were called halos. They were horizontal polarized. If mounted a fraction of a wavelength over a conducting surface then they became DDRR antennas (directional discontinuity ring radiator)and vertical polarized. In the middle of the night the name came to me. And yes, there were those DDRR antennas that mounted on car roofs with suction cups. Michael |
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