Quadrifilar helix

As promised, I would summarize the respons I got on my query on info about the
quadrifilar helix antenna (QHA):

Resonant QHA. IEEE T-AP, may 1969, p.340, etc.

Resonant QHA design, Microwave journal, 1970, p.49, etc.

Shaped-conical radiation pattern performance of backfire qha, IEEE T-AP, may 19
75, p.392, etc.

OPtimization of QHA, IEEE T-AP, july 1971, p.547, etc.

The QHA, IEEE T-AP, march 1974, p.173, etc.

Theoretical design and predictions of volute antenna performance, august 1991,
p.1227, etc.

Multi-element, fractional turn helices, IEEE T-AP, july 1968, p.499, etc.

Books: Kraus, Antennas, chapter 7

Atkins, Hleical antenna design, ARRL/UHF Microwave

Reflections by W. Maxwell, ch 22.

Experimenters manual, ARRL 1990.

QST August 1996

I did not use really the books that are mentioned here; the articles in IEEE T-
AP proved to be very usefull.

Some other sources of information: the Web:

http://128.54.16.15/amsat/articles/g3ruh/117.txt

http://webcom.com/~af9y/helix.html

I am sorry if I left out something.....

Kind regards,

Gerry.

----------------------------------------------------------------------
Gerry van Dooren, XEA (GVDOOREN_at_ESTEC.ESA.NL)
European Space Agency/ESTEC, PO Box 299, 2200AG Noordwijk, Netherlands
tel.: +31-71-565-4664, fax: +31-71-565-4999
Received on Mon Jul 29 1996 - 06:41:00 EDT