Contributors to This Issue 



A. C. Beck, E.E., Rensselaer Polytechnic Institute, 1927; Instructor, 

 Rensselaer Polytechnic Institute, 1927-1928; Bell Telephone Labora- 

 tories, 1928 -. With the Radio Research Department he was engaged 

 in the development and design of short-wave and microwave antennas. 

 During World War II he was chiefly concerned with radar antennas and 

 associated waveguide structures and components. For several years 

 after the war he worked on development of microwave radio repeater 

 systems. Later he worked on microwave transmission developments 

 for broadband communication. Recently he has concentrated on further 

 developments in the field of broadband communication using circular 

 waveguides and associated test equipment. 



J. S. Cook, B.E.E., and M.S., Ohio State University, 1952; Bell 

 Telephone Laboratories, 1952 -. Mr. Cook is a member of the Research 

 in High-Frequency and Electronics Department at Murray Hill and 

 has been engaged principally in research on the traveling- wave tube. 

 Mr. Cook is a member of the Institute of Radio Engineers and belongs 

 to the Professional Group on Electron Devices. 



0. E. DeLange, B.S. University of Utah, 1930; M.A. Columbia Uni- 

 versity, 1937; Bell Telephone Laboratories, 1930 — . His early work was 

 principally on the development of high-frequency transmitters and re- 

 ceivers. Later he worked on frequency modulation and during World 

 War II was concerned with the development of radar. Since that time 

 he has been involved in research using broadband systems including 

 microwa^'e and baseband. Mr. DeLange is a member of the Institute 

 of Radio Engineers. 



R. KoMPFNER, Engineering Degree, Technische Hochschule, Vienna, 

 1933; Ph.D., Oxford, 1951; Bell Telephone Laboratories, 1951 -. Be- 

 tween 1941-1950 he did work for the British Admiralty at Birmingham 

 University and Oxford University in the Royal Naval Scientific Service. 

 He invented the traveling-wave tube and for this achievement Dr. 

 Kompfner i-eceived the 1955 Duddcll Medal, bestowed by the Physical 

 Society of England. In the Laboratoi'ies' Research in High Frequency 



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