title: Reflections Transmission Lines and Antennas (Radio amateur's library)
author:  M. Walter Maxwell 
description: This book looks new. It is a how to book on what is occurring in routine operations with tuners, feed lines and antennas.It is in a language that is easy to understand at the amateur level. The author is a noted antenna designer for RCA Laboratories.
zlib_text:  
   
   
  CHAPTER  19    
   
   
   
   
   
   
   
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  Radio and Modulation 
   
   
  RADIO WAVES 
   
  An electric current going through a conductor generates a magnetic field, as 
  already mentioned on pages 13 and 103 (and probably was known to the reader 
  previously).  A fast change in this field will generate a voltage in any stationary 
  wire that is in the field, as mentioned on page 104.  If the field is very quickly 
  increasing and decreasing periodically, in other words it is a high frequency 
  alternating field, there is something that might be surprising about the way this 
  field goes a long distance as a "wave," and it can induce a voltage in a stationary 
  wire that is far away.  If the frequency is very roughly a million times per second 
  (1 megahertz, or "MHz"), and it has been focused to form a parallel-sided beam, a 
  moderately strong current in the original wire (the transmitting antenna) can send 
  the beam 12,000 miles around the equator to be detected ele