Discussion in 'Amateur Radio News' started by KB7TBT, Apr 25, 2021.
Ham Radio - An end fed half wave cage antenna. How much wider bandwidth does it provide?
Has he done it with a pair of wires spread apart at one end and terminated together at the feed end? That would be a simpler way to get a wider element for homebrew antennas. I would think that could add bandwidth without so much wire and weight. The hams in the old days has issues with antennas like that from weight, ice buildup, wind load, etc. that you would expect over a single wire.
Comme la bien expliqué W8AAZ, le poids de la neige en montagne est énorme.
Should I build my Marconi shack also?
There are plenty of ways of getting acceptable bandwidth; the cage antenna is seldom used by hams because it is a large and cumbersome option.
Well, hey a good assessment.
I have built a few three wire dipoles for ten meters, the wire size and spacing can pretty easily be adjusted to work with 600 ohm open wire line. The additional bandwidth is a bonus, a three wire dipole with about two foot spacing will easily cover 2 MHZ of bandwidth at 2:1 SWR on ten. The thing with cage antennas is that to realize a lot of band width at frequencies below 14 MHZ, the physical dimensions become a problem.
Hello from kc8ikw Joseph Strauss I love how u made that If u can who made the rings can u send me that information thank u very much from kc8ikw Joseph Strauss as all way every one calls me Joey 73s
He went through the experiment to see what would happen and that's all he set out to do. He even said it didn't have any advantages due to being impractical but the antenna did in fact offer wider bandwidth. He took the time to satisfy his curiousity and cared enough to share the experience and the lesson. I learned something and others likely did too. Not sure why the sour attitude.
Not sour, just realistic. It is not unlike using spark instead of any modern mode.
Cage antennas still see occasional use in high powered applications, but not in ham radio in anything but an anecdotal way.
The most famous use of cage antennas is the DUGA array--very QRO.. Take a look at it on google, for example.
I agree it isn't realistic but it wasn't what he was aiming for. Only to answer a single question of bandwidth result of the design.