Cubical
Quad Notes: |
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| ABOUT THE AUTHOR Considered an expert on antennas, L. B. has published 30+ books, with works on antennas for both the beginner and the advanced student. Among his 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, L.B. is Technical & Educational Advisor to the ARRL and Technical Editor for antenneX. As stated by this popular antenna expert, Cubical Quad Antennas have languished in a limbo state between excellent user reports and a mixture of myth and fact about how they perform. This 3-volume series attempts to clarify some aspects of quad array performance and to codify some basic elements of quad design. |
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antenneX Online Magazine proudly introduces its publication this book by L.B. Cebik. This 3-volume series attempts to clarify some aspects of quad array performance and to codify some basic elements of quad design. Volume 1 begins with a necessary review of existing quad arrays, ranging from basic 2-element monoband beams to large multi-band designs. Throughout, quads are analyzed using current method-of-moments computer techniques to determine their HF characteristics: the goal is to find the actual bandwidth of basic performance parameters, such as gain, front-to-back ratio, and feedpoint impedance. The analysis attempts to isolate basic properties that affect overall quad performance. As well, various common point and individual element feed systems are analyzed to show their effects on performance. Full dimensions appear for each quad design, along with antenna model descriptions for those wishing to extend the analysis. Each chapter in this 220-page book is fully illustrated with sketches, graphs, and antenna patterns. There are 125 of these illustrations plus over 80 Tables about performance, dimensions, and parameters for modeling exercises. To see a Review of this book by Dan Handelsman, N2DT, click here.
This Volume 1 book is available in choice of soft cover or eBook (PDF) versions. |
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Among the factors influencing the rethinking of quad design are these: the relative narrow-band properties of the quad, the critical dependence of quad design on the diameter of its elements, the requirement for more spacing between quad elements to achieve optimal coupling relative to linear elements, the need for elements as thick as those used in Yagis if that quad is to net its theoretical gain advantage over the Yagi, and the relatively rapid rate of change of reactance across the quad operating passband. Volume 2 of this series results in computerized monoband quad design programs for 1 to 4 element arrays, as well as in a consideration of larger designs, narrow-band design, VHF designs, and factors influencing the elevation patterns of quads. Volume 1 begins with a necessary review of existing quad arrays, ranging from basic 2-element monoband beams to large multi-band designs. Volume 2 picks up where Volume 1 leaves off and considers other ways to design the Quad and further optimize its potential. This 240-page second book volume is fully illustrated with over 200 sketches, graphs, modeling exercises, antenna patterns and some useful GW Basic utilities.
This Volume 2 book is available in choice of
eBook (PDF) versions (softcover out of stock). |
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VOLUME 3 is available on CD-ROM
or Download eBook only. (Volume 3 is not available in soft cover) |
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HOW TO ORDER: You may order your choice of soft cover or eBook (PDFs) directly online from our Secure Website, or by FAX, telephone or postal service (our telephone numbers and address is available on the order form). Links to the ORDER FORMS with all other ordering information are provided here.
eBOOK PDF VERSIONS Only:
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Cubical Quad Notes
Cubical Quad Notes
ere is
our much-requested release
of Volume 2 of this 3-book series by L.B. Cebik. The popular Volume 1
in reviewed existing quad designs
and uncovered a number of factors that have not been fully appreciated. In this second
volume, these factors lead to a rethinking of quad design and to some total redesign of
monoband quad arrays.
Cubical Quad Notes
olume
3 of Cubical Quad Notes extends the work begun in the first two volumes. In
Volume 1, Cebik reviewed extensively the design of cubical quad beams up to
the time of writing (2000). Designs consisted of roughly 3 types: full size
monoband 2-element quads, shrunken quads, and examples of monoband and
multi-band quads with more than 2 elements. Volume 2 endeavored to re-think
the quad beam, with special emphasis on monoband designs. To rectify
performance deficiencies, the volume optimized the performance of monoband
beams and committed the optimization to a series of computer design
programs. 