*** ANNOUNCEMENT ***
antenneX is very pleased to announce the publication of another new antenna
book, LPDA Notes Volume 2: Hybrid LPDAs by L.B. Cebik, W4RNL.
ABOUT THE BOOK
The first book, LPDA Notes, Volume 1 (Pure LPDAs), looked at the basic
properties of pure log periodic dipole arrays, with special emphasis upon
the types of antennas usually created by radio amateurs.
In this companion Volume 2 of LPDA Notes, W4RNL continues his exploration of
log periodic dipole arrays, and enters the realm of hybrid LPDAs. This
Volume is made up of three main Parts. Part 1 begins with a detailed
analysis of the strengths and weaknesses of various traditional designs for
the log-cell Yagi, essentially a 2-5 element LPDA with the addition of a
parasitic director and reflector. Then, Part 2 turns to the proper long-boom
design for such antennas, with the numerous elements, sorting out the
effects of the many variables involved in their design. Part 3 explores a
number of design considerations for practical LPDAs, including lower HF vs.
UHF designs, narrow-band vs. very wide-band designs, and closing with
split-band vs. continuous-band designs.
As with all W4RNL books, this volume is extensively illustrated both
graphically and with analytical antenna designs. This book contains 200+
pages and 180+ illustrations of diagrams, equations, graphs, patterns,
models, etc. and as the title implies, is mainly devoted to hybrid LPDA-Yagi
designs, often called "log-cell Yagis," and often designed for single
amateur bands. They, too, deserve some new and systematic attention. In
addition, Volume 2 will allow some room to take up additional applications
of the LPDA.
ABOUT THE AUTHOR
Considered an expert on antennas, L.B. Cebik has published over a dozen
books, with works on antennas for both the beginner and the advanced. Among
his many books are a basic tutorial in the use of NEC antenna modeling
software and compilations of his many shorter pieces. His articles have
appeared in virtually every amateur radio publication, with translations of
some into several languages. Retired Professor from the University of
Tennessee at Knoxville, LB is Technical & Educational Advisor to the ARRL.
LB writes a monthly column for antenneX along with features articles each
month -- and has been doing this at antenneX for the past five years.
For more details about this new book release, please goto:
http://www.antennex.com/Sshack/lpda/lpda2.html
Or visit our main Shopping
Shack menu at:
http://www.antennex.com/shopping.htm
Thanks for your time!
Jack L. Stone, Publisher
antenneX Online Magazine
http://www.antennex.com
jack@antennex.com
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