Confinement of unwanted energy

One of the major functions of the FCC Laboratory is the prevention or reduction of interference caused both by radio communications equipment and by other equipment employing radio frequency. In both instances, the problems are very similar, except that radio communications users are generally more cognizant of the interference problem. The writer has hesitated to prepare a paper on the subject because much of the material and many of the recommendations may seem obvious to those experienced in the interference field. However, over the years, the same difficulties have arisen over and over again, so it appears that perhaps the gathering together of information and the presentation in a recapitulative tutorial manner may be of considerable practical use.