[opendtv] Re: VHF Stations Seek Solutions for Reception Problems, by Doug Lung

  • From: Richard Hollandsworth <holl_ands@xxxxxxxxx>
  • To: opendtv@xxxxxxxxxxxxx
  • Date: Wed, 1 Jul 2009 19:11:58 -0700 (PDT)

FYI: ARRL Antenna Book depicts several circularly polarized antennas...most 
used for SATCOM.

Most (not all) of the following frequency independent antennas are CP:
http://www.ece.illinois.edu/about/history/antenna/photos.html

Jasik's "Antenna Engineering Handbook" depicts how four log periodic antenna 
structures
can be arranged as four sides of a pyramid, with two side arrays offset from 
the top/bottom
arrays to provide circular polarization, similar to fol. Quad Zig-Zag Array:
http://www.avsforum.com/avs-vb/showthread.php?p=16702814
[Reading forward, you'll see it identified as a JFD TV Antenna.]

Also:
http://ceta.mit.edu/PIER/pier78/20.07090801.Li.SZL.pdf
http://scholar.lib.vt.edu/theses/available/etd-11242003-123529/unrestricted/Barts_etd_CH2.pdf

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