With several other FlexRadio users using active magnetic loop antennas, I wanted to ask the group for thoughts on covering/housing such an antenna (3ish feet in diameter) on a rotator. Envision this enclosure atop a building, on a short mast, or even sitting within a few feet of the ground.
A radar unit radome-type of enclosure is just one example. A wooden box (no metal at all) is another idea.
Knowing that metal close to my loop has had a significant impact on performance, I brainstormed non-metallic housings that are “rf-transparent”. (I realize that precipitation on the outside of the housing would also have an impact, but I can envision no way to stop the rain from sticking—except maybe spinning at high speed, but I digress). After dropping the inflatable “balloon” housing idea <grin>, I pretty much was left with ideas involving wood and/or fiberglass. Design-wise, I’m sure it could be conceived if needed to blend in better than the bulbous white sphere that “radome” brings to mind.
Questions for the group:
Has anyone built or otherwise obtained an enclosure
for their active magnetic loop on a rotator (other than inside an attic: too much metal around for me)?
2. What are your thoughts/suggestions on “rf-transparent” materials for an enclosure? (e.g. at HF, is wood really rf-transparent? Other materials?)
The experience and imagination of the group is valuable.
Thank you for the time of your consideration and any reply!