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Forwarded message:
From: hygain@compuserve.com (Roger A. Cox WB0DGF)
To: ldennis@highway1.com (L. Dennis Shapiro)
CC: UpTheTower@aol.com (Steve Morris)
To: <towertalk@contesting.com>
Date: 97-03-21 12:30:30 EST
If you require more information on the open-sleeve antenna, please refer to
the ARRL Antenna Book, 16th or 17th edition. In the 16th edition published
1991, on pages 7-4 through 7-8, I describe the basic principles of the
open-sleeve monopole as published by Dr. J.T. Bolljahn of Stanford Research
Institute. The open-sleeve dipole is derived from the open-sleeve
monopole.
Also, I published an article, "The Open-Sleeve Antenna" in CQ Magazine,
Vol. 39, No. 8, August 1983, pages 13-19.
If you have access to an Engineering library, also check out:
H.E. King and J.L. Wong, "An Experimental Study of a Balun-Fed Open-Sleeve
Dipole in Front of a Metallic Reflector", IEEE Trans. Antennas and
Propagation, Vol. AP-20, 201-204, March 1972
In addition, the Antenna Engineering Handbook by Jasik contains some
information on the open-sleeve in the section on aircraft antennas. The
newer version by Johnson also contains some information.
I originally said that the C-3 uses a principle "similar" to the
Explorer-14. The main similarity is the dependence of the impedance on
close-spaced parasitic elements. The close spacing requires a certain
amount of stability to maintain a constant VSWR. These comments should NOT
be taken as being critical of their design.
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