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From: tmsmp@homxb.UUCP (T.SWIFT)
Newsgroups: net.general
Subject: Log-Periodic Dipole Array Antenna
Message-ID: <608@homxb.UUCP>
Date: Fri, 10-May-85 10:30:08 EDT
Article-I.D.: homxb.608
Posted: Fri May 10 10:30:08 1985
Date-Received: Mon, 13-May-85 00:08:02 EDT
Organization: AT&T Bell Labs, Holmdel NJ
Lines: 26



I am interested in building a directional antenna to replace my trap
vertical.  The ARRL Antenna book contains plans for a log-periodic dipole
array.  This caught my attention as an alternative to stacked monoband
beams.  I have obtained the original QST article (Nov. 1973) and will try
to contact the author.

Does anyone have any experience with or knowledge of this type of antenna?
Does any commercial manufacturer offer one?  If not, why is there no
commercial interest?  Is there a fatal flaw in the design?  The QST
article states that the author uses a transmatch to "eliminate possible
harmonic radiation caused by the frequency-independent nature of the
array."  Is interference a major consideration?

Any help is greatly appreciated.

Thanks

Tom Swift
KD2MF (formerly WA2JEH)
AT&T Information Systems
Holmdel
homxb!tmsmp
201-949-3374 (W) or 201-577-6945 (H)