title: The ARRL Handbook for Radio Communications 2011
author: Arrl
description: The ARRL Handbook for Radio Communications is the most comprehensive guide to radio electronics and experimentation. The book is part reference and part applied theory, filled with practical treatments of basic electronic fundamentals, RF design, digital and software radio technology, and antenna construction. The ARRL Handbook strikes the perfect balance between presentations of time-tested material and coverage of the expanding scope of Amateur Radio and the state-of-the-art.
  
  For more than eight decades, The Handbook has empowered radio amateurs and professionals alike with is do-it-yourself approach, finding its way onto workbenches and operating desks, and into technical libraries and institutions.
  
  Always Revised! This eighty-eighth edition includes new topics, new projects, and expanded content.
  
  CD-ROM Included. The CD-ROM at the back of the book includes all of the fully-searchable text and illustrations in the printed book, as well as companion software, PC board templates and other support files.
zlib_text: Important Information -- Please Read
  You have installed the ARRL version of EZNEC 3.0. It's a demo version of EZNEC, except that it has the
  capabilities of a full, standard EZNEC program when operating on special description files.
  It includes the complete on-line manual, and all the features of the standard EZNEC program, with only two
  exceptions. The first is that the maximum number of segments allowed in any model is the demo limit of 20
  rather than the 500 of the standard EZNEC version -- except for specially signed EZNEC ARRL files
  (explained below). Except for the specially signed ARRL files, the 20 segment demo version restriction limits
  the complexity of antenna you can model with the ARRL version. The second exception is that you can't
  update the ARRL version with standard EZNEC 3.0 maintenance updates. However, the ARRL version can
  be updated with EZNEC demo versions. The demo program on the http://eznec.com web site is always up
  to date, so you can always update your ARRL pr