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rickman · October 29th 14, 02:40 AM posted to rec.radio.amateur.antenna

On 10/28/2014 9:27 PM, wrote:
rickman wrote:
On 10/28/2014 8:18 PM, wrote:

snip

Not sure what you are saying. There are tons of examples. But when I
did my search there was very little info on the design of loop antennas.
At least not much in depth enough to let me figure out how much signal
I might get from a given circuit.

I am asking about specific details of loop antenna design. I'm not sure
why people keep suggesting I look at "examples".

WWVB is a US time and frequency standard station and the Internet is
full of articles on DIY antennas and receivers for WWVB.

Many of those articles go into great detail about their design.

As you asked about 60 kHz, it would seem to me to be the place to start
to look for words of wisdom on the subject, no matter what particular
detail you are looking for.

I believe I said I have read much of that info. I did this a couple of
years ago and picked an approach. I was not able to convince myself it
would work properly. So now, before I build anything more, I would like
to fill in some of the details.

Of all the design info I found, not one discussed optimizing the antenna
for maximum voltage. When I was discussing this in another group,
specifically about a spice simulation of the circuit, someone pointed
out that I needed to include the effect of the radiation resistance.
Again, I have not found any other discussions of the radiation
resistance of a receiving antenna, specifically a tuned, shielded loop
antenna. Is this a red herring? When designing an antenna with a very
high Q, can the radiation resistance of a shielded loop antenna be ignored?

You say I should "start" with the many words of wisdom on the subject.
I am not "starting" and I have found many words of wisdom on loop
antennas in general, but not much on the specific questions I am asking.

It's a little bit funny, but when the one who shall not be named asked
about short antennas the discussions were full of info on radiation
resistance and details. Now that I am asking about my design, no one
wants to discuss the technical issues and just recommend some site where
they tell you how to build the antenna that suited their purpose.

--

Rick

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