I was looking TurboCAD in some detail after suggesting it might meet the needs of a friend. In the process I looked at their Symbol CD with 10 million symbols and naturally wandered to the antenna sy
snip Why is the longer element called a reflector while the shorter element called a director> What is the origin of the naming? Basically, don't they both re-radiate because of the same reason? Wha
That is a good one. Actually, I would like to take a couple of the "executives" at the company I work for and hang them from a aluminum boom high in the air. 73, Stew K3ND http://lists.contesting.com
ROTFL! Good one. Keith --Original Message-- From: towertalk-bounces@contesting.com [mailto:towertalk-bounces@contesting.com] On Behalf Of W0UN -- John Brosnahan Sent: Wednesday, June 30, 2004 8:47 AM
Yeah, but hang them by what parts of their body? 73 Bob KQ2M _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations",
snip Why is the longer element called a reflector while the shorter element called a director> What is the origin of the naming? Basically, don't they both re-radiate because of the same reason? What
Other than the empirical (and some computer) studies that seem to show that there just isn't any return on the investment in additional reflectors. For some reason (and I'm not an expert in EM) there
The parasitic element that reflects back toward the driven element is called the reflector. I think the name origin is obvious. If it were shorter than the driven element it would not exhibit this ch
proportional to the where the aperture direction. There are directivity/gain The electrical aperture or performance is NOT defined by the physical area an antenna occupies. The electrical aperture i
At 05:08 PM 6/30/2004 -0500, you wrote: The parasitic element that reflects back toward the driven element is called the reflector. I think the name origin is obvious. If it were shorter than the dri
proportional to the where the aperture direction. There are directivity/gain The electrical aperture or performance is NOT defined by the physical area an antenna occupies. Sort of true. Performance
In the following link, read the section titled Operation. http://www.tpub.com/neets/book10/42l.htm Keith Not exactly... The far field created by the antenna (any antenna) is the sum of the contributi
It's called the dumbing down of Amateur Radio. That's the end truth.. 73's Jim KJ9A James E. Chaggaris President PowerOne Corporation 1211 W. 22nd St. Suite 802 Oak Brook, IL 60523 Phn: 630-586-9101
While most of the NEETS documents are fine, as far as explaining what's going on, quite simply, the explanation in the referenced link is incorrect. For example: "When the parasitic element is placed
Interesting critique of a published article. Thanks. However, I did not post the link to provoke a response. I think it is a good, simple explanation for the original post: -- Why is the longer eleme
driven element is called it were shorter than characteristic. It is usually magnetic field set This induces a increases the Yes, that's basically correct. The Yagi is an end-fire array, and endfire
I should think that if you optimized the antenna, there wouldn't be a significant difference between feeding at the back or the front. Feeding in the middle is always going to be better. In fact, doi
At 05:44 PM 7/1/2004 -0400, doc wrote: I should think that if you optimized the antenna, there wouldn't be a significant difference between feeding at the back or the front. Feeding in the middle is
elements driven) some matching issues). The log periodic uses crossfire phasing, and that means it must always fire towards the feedpoint. The delay as you move back through the transmission line fe
elements driven) some matching issues). The log periodic uses crossfire phasing, and that means it must always fire towards the feedpoint. There is no way around that, so the statement a "log doesn't