Steve,
DDRR stands for Directional Discontinuity Ring Radiator. I thought
about building one for 30 meters (and still may) but rejected it at
the time since horizontal space is more of a premium item for me than
vertical space. They have basically the same physical requirements as
MagLoops. Fat conductors, low loss connections, high voltage
capacitors if you're gonna transmit through them. Since they are more
akin to a 1/4 wavelength transmission lines they are probably not as
size tolerant as MagLoops. Haven't tried it, though, so can't really
say.
I'm in favor of discussing just about any kind of compact antenna
here. There's lots of controversy over whether EH, CFA and Capacitive
Disc Antennas work or not. Most of that has to do with inventor's
claims that seem to contradict Maxwell's equations. I don't think
that is very important. Some of the designs look like they may be
very viable solutions for SWLs or folks who are limited to using
indoor antennas.
73,
'Bear' NH7SR
--- In loopantennas@..., "Steve" <alienrelics@y...> wrote:
--- In loopantennas@..., "Brian Wesley Rich"
<science@w...> wrote:
Man, where do you find the time? I mean, HAM, propmaking,
electronics,
weird antennas, mad scientisting, moderating...
I need a tutorial from you!
My brain won't stop buzzing. It's hard to wind down and sleep at
night. When I was young and my body could take it, I might stay up
for
a couple of days or 3 days (rarely!) in a row. If you only knew how
many projects I have going... I used to read Sci Fi and science
constantly, now it's datasheets and technical lit.
I'm not a Ham, though. Never learned morse code.
Way above AM BCB, but is anyone here making DDRR antennas? Those
horizontal loop, omnidirectional antennas? Direct driven ring
radiator?
Found a site for one that does not require a ground plane. It is to
the DDRR above what a vertical 1/2 wave is to a 1/4 whip with
ground.
How about microwave patch antennas? How do you feel about allowing
the
related topics of radio direction finding and low profile antennas
as
on topic subjects?
Steve
