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On Jul 9, 12:55 am, "Clark Kent" wrote:
"Art Unwin" wrote in message ... [text deleted] Art Unwin unwinantennas.com/ I went to your website but I didn't see any specific antenna information, like a ham might want to build a new type of antenna, to try it out. I saw a write-up of an H-F antenna with elements wound into a spiral and wondered if that might be yours, as you speak of physically small antennas (fraction of an expected resonant size). Pls advise in group. TNX. A helix is an excellent example to talk about to arrive at small full wave antennas. When you follow the reasoning of the extension to Gaussian law of statics which makes it dynamic it brings to the surface that a radiator can be any size or shape as long as it is in equilibrium. So to meet the intent of both laws which are now the same, we must not impose any lumped circuits while making our antenna. Now a helix is a fractional wave antenna with added capacitive and inductive lumped loads, thus to follow the intent of Maxwell's law we must first extend the antenna to a full wave form while at the same time cancelling the added lumped loads. So if we start with a half wave helix in standard form we have to continue the element in a down ward direction where we then reach the starting point. Doing this first completes the circuit to a full wave and secondly it cancels the pre imposed capacitive and inductive lumped load that are inherrent with a standard helix antenna PLUS we have removed the need for a ground plane as the completed antenna is now a full instead of fractional circuit. Now instead of winding with a helix angle of some ten degrees plus we can now push the windings close together and then tip the new antenna to a 10 degree plus angle to put the whole thing in equilibrium by replacing the angular force represented by the form pitch that we removed by losing the pitch of the winding. Actually this works out quite well as you can now laquer the assembly where it has no voids and is quite strong. By the way my antennas are always of a full wavelength which by virtue of its reduced volume then becomes a small FULL wave antennas to retain the inherrent efficiencies of full wave antennas in equilibrium as well as resonant. Allow me to continu on this line of thinking. It should now be seen that an array is also shrunken not only by the shortened elements but also by the fact that element spacings conform to the equilibrium of the array as a whole! We then have an array that does not have to have elements at certain distance from each other ad infirnitum but just two elements much closer together where all radiation is accounted for! Hope the above helps you out but I do expect howls of resistance from others as they wish to protect the notion that "all is known about antennas" thus this posting is sacrelidge and must be negated at all costs. And some others ofcourse will vehemently reject the notion of the WEAK force being revealed by a ham where Einstein could no so for me the end of the World is aproaching or at the least the magnetic pole of our Earth has started a full rotation! Cheers and beers Art Unwin KB9MZ....xg unwinantennas.com/ |
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