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Total 26 documents matching your query.

21. Topband: One way propagation (score: 1): Author: Ken Brown <ken.d.brown@hawaiiantel.net>; Date: Mon, 12 Nov 2007 10:04:00 -1000; Those of us who have worked with VHF, UHF and microwave radio systems, particularly those which simultaneously transmit and receive using the same antenna, are familiar with the three port device cal; /archives//html/Topband/2007-11/msg00081.html (9,117 bytes)
22. Re: Topband: One way propagation (score: 1): Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>; Date: Mon, 12 Nov 2007 19:25:35 -0500; Nonlinear isotropic media are a *necessary* but *not sufficient* condition for nonreciprocal electromagnetic wave propagation. I'm not saying it can't happen, but the nonlinearity and anisotropy of; /archives//html/Topband/2007-11/msg00082.html (7,153 bytes)
23. Re: Topband: One way propagation (score: 1): Author: PaulKB8N@aol.com; Date: Mon, 12 Nov 2007 20:55:08 EST; I have a slightly less scientific take on this phenomenon. I was reminded of it when I was on 15M prior to the start of CW Sweepstakes. As I tuned up and down a very quiet band, loud signals appeared; /archives//html/Topband/2007-11/msg00084.html (9,079 bytes)
24. Re: Topband: One way propagation (score: 1): Author: "Sam Dellit" <samuel.dellit@optusnet.com.au>; Date: Tue, 13 Nov 2007 15:54:29 +1100; Interesting thread, one poster mentioned work by John Wang / FCC on MF-AM field strength prediction curves. I don't recall sighting that work, but prior to the 1975 Regional Administrative Broadcasti; /archives//html/Topband/2007-11/msg00086.html (8,981 bytes)
25. Re: Topband: One way propagation (score: 1): Author: k3bu@optonline.net; Date: Fri, 16 Nov 2007 00:02:01 +0000 (GMT); Hi Sam, thanks for more info on the subject. Indeed, the atmo/ionosphere is a complicated medium, some dielectric, some conductor, some mirrors, some fiber optics, some clouds like blotches, some ni; /archives//html/Topband/2007-11/msg00127.html (11,958 bytes)
26. Re: Topband: One way propagation (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Thu, 15 Nov 2007 18:30:22 -0800 (PST); Polarization and linearity are independent of each other. A medium can rotate polarization or not whether it is linear or not. The issue is not linearity but rather reciprocity. In reciprocal media,; /archives//html/Topband/2007-11/msg00129.html (9,496 bytes)

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