^ BUL SYSTEM TECHNICAL JOVkNAL 



gain results. Because of the broad-band properties of the artificial dielectric, 

 this improved gain can be maintained over a very wide band of frequencies. 

 The lenses can be built to focus waves of any polarization and, if desired, 

 the dielectric can be designed to exhibit strong dispersion. Theoretical 

 calculations of the expected dielectric constant are in fairly good agreement 

 with experiment for values less than 1.5; for higher values an accurate 

 determination of the true value must be obtained experimentally. 



Acknowledgement 



The author wishes to express his appreciation to Dr. S. A. Schelkunoff for 

 his advice and consultation, and to the members of the Holmdel Radio 

 Research Laboratory, especially to Mr. William Legg, for assistance and 

 cooperation during the course of this work. 



