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#1
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Optimized wideband antenna OWA
I was reading up on the above antenna which is a take off
of an antenna I patented ,( Constant Impedance Matching System) and written up in QST March, 1998 I also described this system in earlier postings on this newsgroup. Those who use this antenna should look at moving the extra director back closer to the driven element as the constant impedance is drawn not from the inferred increased diameter of the driven element but from the change over power point between the two close radiators which changes as frequency changes, i.e. the cross over point is related to the matching impedance point. (Coupling distances measured as low as 1 mm have been used successfully with mylar as an interface) There is absolutely no reason why this matching system should not be used more extensively where the search for gain has resulted in shortened bandwidth where the addition of this matching system has allowed for increases in gain. ( It should be noted that as the frequency is raised the input impedance requires extra inductance and capacitance for a better match and thus moves further along the radiator before tranference to the coupled antenna) ART |
#2
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Optimized wideband antenna OWA
art wrote:
... ART Art: What kind of data/text/diagrams/etc. on vertical monopoles/unipoles omnis' do you have? Regards, JS |
#3
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Optimized wideband antenna OWA
On 29 May, 09:28, John Smith I wrote:
art wrote: ... ART Art: What kind of data/text/diagrams/etc. on vertical monopoles/unipoles omnis' do you have? Regards, JS A previous patent dealt with that when I placed a resonator very close to the center of a vertical. This resonator has a variable capacitor in it and the feed went up the center of the pole. This gave a 20 thru 10 multiband antenna. Again the resonator was only about a mm from the antenna. The group didn't like that either which is not a surprise. ART |
#4
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Optimized wideband antenna OWA
"art" wrote in message oups.com... I was reading up on the above antenna which is a take off of an antenna I patented ,( Constant Impedance Matching System) and written up in QST March, 1998 I also described this system in earlier postings on this newsgroup.------------- --------- antenna) ART What page? Can't seem to find the reference in March '98 QST. -- Frank |
#5
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Optimized wideband antenna OWA
On 29 May, 09:41, "Frank's"
wrote: "art" wrote in message oups.com... I was reading up on the above antenna which is a take off of an antenna I patented ,( Constant Impedance Matching System) and written up in QST March, 1998 I also described this system in earlier postings on this newsgroup.------------- --------- antenna) ART What page? Can't seem to find the reference in March '98 QST. -- Frank Thought about past times so I looked up comments on the OWA antenna on the net and got the reference to QST from there. By the way this newsgroup laughed at this and ridiculed me when I explained it a few years before the article was written, the same way they ridiculed with the Gaussian antenna. A lot of people were pointed to this patent by the patent office with respect to their claims. Note Cebik did some follow up writing on that antenna.I applied for another patent along the same lines at the same time but let it go when my health went down hill! Art |
#6
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Optimized wideband antenna OWA
"art" wrote in message oups.com... On 29 May, 09:41, "Frank's" wrote: "art" wrote in message oups.com... I was reading up on the above antenna which is a take off of an antenna I patented ,( Constant Impedance Matching System) and written up in QST March, 1998 I also described this system in earlier postings on this newsgroup.------------- --------- antenna) ART What page? Can't seem to find the reference in March '98 QST. -- Frank Thought about past times so I looked up comments on the OWA antenna on the net and got the reference to QST from there. By the way this newsgroup laughed at this and ridiculed me when I explained it a few years before the article was written, the same way they ridiculed with the Gaussian antenna. A lot of people were pointed to this patent by the patent office with respect to their claims. Note Cebik did some follow up writing on that antenna.I applied for another patent along the same lines at the same time but let it go when my health went down hill! Art Googled OWA and checked out he design of the antenna, Isnt this is pretty much what you get when you let a program likeYagi Optimiser tweak the antenna for max bandwidth vs SWR? Seems like back in the 70s I remember some truck stop special CB antennas built like this that made great claims for their SWR. No doubt the claim is correct but what is the tradeoff in gain, cost, ruggedness..... Jimmie Jimmie |
#7
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Optimized wideband antenna OWA
On May 29, 8:12 pm, "Jimmie D" wrote:
Seems like back in the 70s I remember some truck stop special CB antennas built like this that made great claims for their SWR. No doubt the claim is correct but what is the tradeoff in gain, cost, ruggedness..... Jimmie LOL...A dummy load does great in the SWR dept.. Doesn't mean I want to use one as a radiator of my precious RF... :/ As far as Art's matching design proposal, I can't see the '98 article in question, so as usual, my cat has mittens. MK |
#8
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Optimized wideband antenna OWA
LOL...A dummy load does great in the SWR dept.. Doesn't mean
I want to use one as a radiator of my precious RF... :/ As far as Art's matching design proposal, I can't see the '98 article in question, so as usual, my cat has mittens. MK All I can find on the web is the following. http://www.cebik.com/qex/owa.pdf http://www.antennex.com/shack/Nov00/dan_edit.htm http://www.cebik.com/vhf/owa.html Some mention is made of QST here, but they did not seem to actually publish the article: http://www.naic.edu/~angel/kp4ao/ham/owa.html By the same author '98 QST, pp 38 - 40. -- Frank |
#9
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Optimized wideband antenna OWA
On 29 May, 19:12, "Jimmie D" wrote:
"art" wrote in message oups.com... On 29 May, 09:41, "Frank's" wrote: "art" wrote in message groups.com... I was reading up on the above antenna which is a take off of an antenna I patented ,( Constant Impedance Matching System) and written up in QST March, 1998 I also described this system in earlier postings on this newsgroup.------------- --------- antenna) ART What page? Can't seem to find the reference in March '98 QST. -- Frank Thought about past times so I looked up comments on the OWA antenna on the net and got the reference to QST from there. By the way this newsgroup laughed at this and ridiculed me when I explained it a few years before the article was written, the same way they ridiculed with the Gaussian antenna. A lot of people were pointed to this patent by the patent office with respect to their claims. Note Cebik did some follow up writing on that antenna.I applied for another patent along the same lines at the same time but let it go when my health went down hill! Art Googled OWA and checked out he design of the antenna, Isnt this is pretty much what you get when you let a program likeYagi Optimiser tweak the antenna for max bandwidth vs SWR? Seems like back in the 70s I remember some truck stop special CB antennas built like this that made great claims for their SWR. No doubt the claim is correct but what is the tradeoff in gain, cost, ruggedness..... Jimmie Jimmie- Hide quoted text - - Show quoted text - Jimmie, If the cb antenna is the same as what I disclosed in my patent I should not have obtained the patent! I do know that a few patent requests were referred to my patent after I disclosed it on this newsgroup so it seems odd that I and others were not referred to the CB antenna as being the prior art. As far as gain trade off there is none. The constant impedance allows for continuation of gain at band edges when the gain striven for is to high for the bandwidth in question. But then this is just a patent, and I have always found that people would always say I already knew that or it has already been invented. Odd how some people react to the new or change. It will be the same for the Gaussian antenna as already one has stated it has already been invented but does not give particulars. On the impedance antenna I had numourous requests to go to San Francisco with all expences paid just to discus the basics and future but health problems of the heart told me to forget about the whole thing as well as the sarcastic comments from the resident experts of this group which continues to this day. I don't need money so I am glad the idea is still alive ala Cebik who has written extensively about it. Really you should refer your questions to him rather than entrap me into another augument. Art |
#10
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Optimized wideband antenna OWA
"art" wrote in message oups.com... On 29 May, 19:12, "Jimmie D" wrote: "art" wrote in message oups.com... On 29 May, 09:41, "Frank's" wrote: "art" wrote in message groups.com... I was reading up on the above antenna which is a take off of an antenna I patented ,( Constant Impedance Matching System) and written up in QST March, 1998 I also described this system in earlier postings on this newsgroup.------------- --------- antenna) ART What page? Can't seem to find the reference in March '98 QST. -- Frank Thought about past times so I looked up comments on the OWA antenna on the net and got the reference to QST from there. By the way this newsgroup laughed at this and ridiculed me when I explained it a few years before the article was written, the same way they ridiculed with the Gaussian antenna. A lot of people were pointed to this patent by the patent office with respect to their claims. Note Cebik did some follow up writing on that antenna.I applied for another patent along the same lines at the same time but let it go when my health went down hill! Art Googled OWA and checked out he design of the antenna, Isnt this is pretty much what you get when you let a program likeYagi Optimiser tweak the antenna for max bandwidth vs SWR? Seems like back in the 70s I remember some truck stop special CB antennas built like this that made great claims for their SWR. No doubt the claim is correct but what is the tradeoff in gain, cost, ruggedness..... Jimmie Jimmie- Hide quoted text - - Show quoted text - Jimmie, If the cb antenna is the same as what I disclosed in my patent I should not have obtained the patent! I do know that a few patent requests were referred to my patent after I disclosed it on this newsgroup so it seems odd that I and others were not referred to the CB antenna as being the prior art. As far as gain trade off there is none. The constant impedance allows for continuation of gain at band edges when the gain striven for is to high for the bandwidth in question. But then this is just a patent, and I have always found that people would always say I already knew that or it has already been invented. Odd how some people react to the new or change. It will be the same for the Gaussian antenna as already one has stated it has already been invented but does not give particulars. On the impedance antenna I had numourous requests to go to San Francisco with all expences paid just to discus the basics and future but health problems of the heart told me to forget about the whole thing as well as the sarcastic comments from the resident experts of this group which continues to this day. I don't need money so I am glad the idea is still alive ala Cebik who has written extensively about it. Really you should refer your questions to him rather than entrap me into another augument. Art Wasnt talking about your patent, I found about OWA has no similarity to your patented design, They were just normal run of the mill yagis optimized to have a realtively flat SWR over there design range. Nothing new. Jimmie |
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