This is the earliest reference I could find:
Morgan, H. K. A multifrequency tuned antenna system,. Electronics, 13,
pp. 42-8. August 1940
If you look at the reference list item 12 in this paper it appears that
the paper's author did his PHD thesis on trapped cylindrical antennas:
D. Smith, "The trap-loaded cylindrical antenna," in /IEEE Transactions
on Antennas and Propagation/, vol. 23, no. 1, pp. 20-27, January 1975,
doi: 10.1109/TAP.1975.1141000.
https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=1141000
73, Mike W4EF.........
On 1/8/2024 3:06 PM, Jim Lux wrote:
I'm looking for a paper reference to basic trapped antenna design and
performance, preferably in something like an IRE or AIEE journal (I'm sure it's
pre-IEEE).
I'm writing a paper and I make a reference to "yeah, you could do this with traps, but here's a
different way" and a reviewer (who is obviously not a ham) said "what's a trapped
antenna". And rather than write paragraphs about L/C resonant circuits and how they work in
an antenna, I'd like to just say:
Trapped antennas as described by [Maxwell, 1862, Rayleigh, 1903, and Pocklington,
1897] were explored, but suitable trap configurations could not be found.
(Obviously, Maxwell, Rayleigh, and Pocklington didn't talk about trapped
antennas)
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