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#1
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Interesting Antennas
While looking for something else, I came across two interesting antennas in
the USPTO data base. Sixty years separates their filing dates. Patent 2,268,640 shows an antenna invented by the famous George H. Brown. It may be the first use of nested Yagi type antennas. Patent 6,411,264 shows a supposed improvement on the 8JK antenna such that efficiency is preserved and a large F/B is effected. The inventor is N7CL. Http://www.uspto.gov/ is a place to start. Go to Patents and then to Patent Searches. Enjoy, Mac N8TT -- J. Mc Laughlin; Michigan U.S.A. Home: |
#2
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Thats interesting Mac I am going to look at that to see what he did.
I modelled a wierd 20 metre antenna today and it finished up with four lobes in aq vertical direction at the front and the same number of vertical lobes at the rear. Need to find out what causes extra lobes. The extra lobes did drop the TOA down however to around 8 to 9 degrees Regards Art "J. Mc Laughlin" wrote in message ... While looking for something else, I came across two interesting antennas in the USPTO data base. Sixty years separates their filing dates. Patent 2,268,640 shows an antenna invented by the famous George H. Brown. It may be the first use of nested Yagi type antennas. Patent 6,411,264 shows a supposed improvement on the 8JK antenna such that efficiency is preserved and a large F/B is effected. The inventor is N7CL. Http://www.uspto.gov/ is a place to start. Go to Patents and then to Patent Searches. Enjoy, Mac N8TT -- J. Mc Laughlin; Michigan U.S.A. Home: |
#3
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On Tue, 15 Mar 2005 16:51:36 -0500, "J. Mc Laughlin"
wrote: Patent 6,411,264 shows a supposed improvement on the 8JK antenna such that efficiency is preserved and a large F/B is effected. The inventor is N7CL. Hey, I know Eric. See: http://www.cal-av.com/antennas.html for the commercial version of his design. |
#4
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I don't operate on 40 M so I may be missing something but exactly what is it
that stands out with this antenna that would make it desirable to hams? Efficiency would be reflected by the loads used which is not necessarily "state of the art". He then states "a large F/B is effected" but it doesn't show before and after overlaid plots ! Would hams have an interest in a two element 20 M antenna that have lower TOA than the norm, say 9 degrees instead of the normal 14 degrees? I think I can quickly put one together for the week end while putting the present assembly aside. Regards Art "Wes Stewart" wrote in message ... On Tue, 15 Mar 2005 16:51:36 -0500, "J. Mc Laughlin" wrote: Patent 6,411,264 shows a supposed improvement on the 8JK antenna such that efficiency is preserved and a large F/B is effected. The inventor is N7CL. Hey, I know Eric. See: http://www.cal-av.com/antennas.html for the commercial version of his design. |
#5
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I had to chuckle over this -- Art being critical of another antenna
design because the designer doesn't produce adequate quantitative data or explain clearly what its advantages are. Thanks for the entertainment. I need a break from reality once in a while. Roy Lewallen, W7EL wrote: I don't operate on 40 M so I may be missing something but exactly what is it that stands out with this antenna that would make it desirable to hams? Efficiency would be reflected by the loads used which is not necessarily "state of the art". He then states "a large F/B is effected" but it doesn't show before and after overlaid plots ! Would hams have an interest in a two element 20 M antenna that have lower TOA than the norm, say 9 degrees instead of the normal 14 degrees? I think I can quickly put one together for the week end while putting the present assembly aside. Regards Art |
#6
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On Wed, 16 Mar 2005 02:57:31 GMT, "
wrote: I don't operate on 40 M so I may be missing something but exactly what is it that stands out with this antenna that would make it desirable to hams? Efficiency would be reflected by the loads used which is not necessarily "state of the art". He then states "a large F/B is effected" but it doesn't show before and after overlaid plots ! Before and after what? Would hams have an interest in a two element 20 M antenna that have lower TOA than the norm, say 9 degrees instead of the normal 14 degrees? I think I can quickly put one together for the week end while putting the present assembly aside. Regards Art "Wes Stewart" wrote in message .. . On Tue, 15 Mar 2005 16:51:36 -0500, "J. Mc Laughlin" wrote: Patent 6,411,264 shows a supposed improvement on the 8JK antenna such that efficiency is preserved and a large F/B is effected. The inventor is N7CL. Hey, I know Eric. See: http://www.cal-av.com/antennas.html for the commercial version of his design. |
#7
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On Wed, 16 Mar 2005 02:57:31 GMT, "
wrote: I don't operate on 40 M so I may be missing something but exactly what is it that stands out with this antenna that would make it desirable to hams? Efficiency would be reflected by the loads used which is not necessarily "state of the art". He then states "a large F/B is effected" but it doesn't show before and after overlaid plots ! Would hams have an interest in a two element 20 M antenna that have lower TOA than the norm, say 9 degrees instead of the normal 14 degrees? That last post got away from me too soon. Yes, I'd like a "TOA" of 9 degrees. Unfortunately, I don't have room for a 110' tower. Now what do I do? |
#8
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The gentleman has his patent.
If I disclosed how this could be beat on this forum would I still be able to get a patent for myself if I so desire? Or would it be best to not disclose it at all? I could not see or define the advantages from what I read which is why I placed the posting. Absolutely nothing wrong with that Roy, you must be losing it. Actually I have heard the same thing said of your computor program instructions Regards Art "Roy Lewallen" wrote in message ... I had to chuckle over this -- Art being critical of another antenna design because the designer doesn't produce adequate quantitative data or explain clearly what its advantages are. Thanks for the entertainment. I need a break from reality once in a while. Roy Lewallen, W7EL wrote: I don't operate on 40 M so I may be missing something but exactly what is it that stands out with this antenna that would make it desirable to hams? Efficiency would be reflected by the loads used which is not necessarily "state of the art". He then states "a large F/B is effected" but it doesn't show before and after overlaid plots ! Would hams have an interest in a two element 20 M antenna that have lower TOA than the norm, say 9 degrees instead of the normal 14 degrees? I think I can quickly put one together for the week end while putting the present assembly aside. Regards Art |
#9
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"Wes Stewart" wrote in message ... On Wed, 16 Mar 2005 02:57:31 GMT, " wrote: I don't operate on 40 M so I may be missing something but exactly what is it that stands out with this antenna that would make it desirable to hams? Efficiency would be reflected by the loads used which is not necessarily "state of the art". He then states "a large F/B is effected" but it doesn't show before and after overlaid plots ! Before and after what? The original design is 50 years old. He infers that he has improved the design, specifically with respect to F/B What was it before and to what amount was it improved ? Art , Would hams have an interest in a two element 20 M antenna that have lower TOA than the norm, say 9 degrees instead of the normal 14 degrees? I think I can quickly put one together for the week end while putting the present assembly aside. Regards Art "Wes Stewart" wrote in message . .. On Tue, 15 Mar 2005 16:51:36 -0500, "J. Mc Laughlin" wrote: Patent 6,411,264 shows a supposed improvement on the 8JK antenna such that efficiency is preserved and a large F/B is effected. The inventor is N7CL. Hey, I know Eric. See: http://www.cal-av.com/antennas.html for the commercial version of his design. |
#10
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"Wes Stewart" wrote in message ... On Wed, 16 Mar 2005 02:57:31 GMT, " wrote: snip That last post got away from me too soon. Yes, I'd like a "TOA" of 9 degrees. Unfortunately, I don't have room for a 110' tower. Now what do I do? Use a cell phone Art |
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