Cage Monopole Test Series
The last time I tried a cage monopole FM antenna it didn't seem to do anything unusual compared to a plain wire, but then I learned that I did it wrong.
Since I have an indoor antenna tower built from bamboo poles the hanging facilities for a cage monopole are here, so it won't be difficult.
Instead of a single vertical 1/4 wavelength wire, a cage monopole consists of 3 or 4 wires tied to a common point at the feed-line and joined at the top by soldered wires that define the triangle or rectangle of the elements.
Previously I didn't realize that the top points had to be joined together to meet the definition of cage monopole.
Theoretically as I understand it the method acts like a wide metal pipe but is much less costly.
Increased bandwidth.
Druid Hills Radio triggers past memory: "Increased bandwidth."
Right. I remember that now.
And since my transmission is strictly mono FM there's no benefit to increased bandwidth.
If sub-carriers were in use bandwidth would help.
This project is canceled.
Albert y cancel it Carl? I would have liked to have known how it dealt with the multipath problem that you had before remember how you pointed out that you would get that whoosh sound from time to time? Well I wonder if this antenna would have solved some of that problem.
DHR, what will a cage-monopole FM antenna do to improve multipath in an indoor setting?