Frederick B. Llewellyn

Frederick Britton Llewellyn (1897 to 1971) was an American electrical engineer, born in New Orleans, noted for his work on high-frequency electronics at Bell Telephone Laboratories. After training at the Marconi School for Wireless Operators, service in the merchant marine and the Navy, and a degree at Stevens Institute of Technology in 1922, he joined Western Electric in 1923 and Bell Laboratories in 1925, and took a doctorate at Columbia University in 1928. He helped develop the first public ship-to-shore telephone service in 1929, studied noise in vacuum tubes and constant-frequency oscillators, and with Edwin H. Armstrong designed a sensitive receiver used to detect a radar signal reflected from the Moon in Project Diana. He was president of the Institute of Radio Engineers in 1946 and received the 1936 IEEE Morris N. Liebmann Memorial Award.