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| Newer page: | version 3 | Last edited on Monday, March 1, 2004 7:56:58 am | by JohnMcPherson | Revert |
| Older page: | version 2 | Last edited on Sunday, February 29, 2004 11:52:30 pm | by MichaelBordignon | Revert |
@@ -1,7 +1,8 @@
Fresnel zone: In radio communications, one of a (theoretically infinite) number of a concentric ellipsoids of revolution which define volumes in the radiation pattern of a (usually) circular aperture.
- Note 1
: The cross section of the first Fresnel zone is circular. Subsequent Fresnel zones are annular in cross section, and concentric with the first.
- Note 2: Odd-numbered Fresnel zones have relatively intense field strengths, whereas even numbered Fresnel zones are nulls.
- Note 3: Fresnel zones result from diffraction by the circular aperture. (188)
+Notes
:
+#
The cross section of the first Fresnel zone is circular. Subsequent Fresnel zones are annular in cross section, and concentric with the first.
+#
Note 2: Odd-numbered Fresnel zones have relatively intense field strengths, whereas even numbered Fresnel zones are nulls.
+#
Note 3: Fresnel zones result from diffraction by the circular aperture. (188)
Interesting read at http://www.zeuswireless.com/support/fresnel-zone.php
