Patents - Charles K. (Ned) Birdsall
Low-pass non-reactive frequency selective filter in which high frequencies are absorbed in dissipative material
Charles K. Birdsall and Richard M. White
U.S. Patent 3,427,573. February 1969
Two-stream cyclotron wave amplifier
Charles K. Birdsall
U.S. Patent 3,346,819. October 1967
Ladder type slow wave structure having side plates at an angle other than 90°
Charles K. Birdsall, Richard M. White and Richard W. Grow
U.S. Patent 3,227,914. January 1966
High frequency energy apparatus with interleaved ladder line slots
Charles K. Birdsall and Richard W. Grow
U.S. Patent 3,202,867. August 1965
Electron discharge device
Charles K. Birdsall and George R. Brewer
U.S. Patent 3,068,377. December 1962
Traveling-wave tube
Charles K. Birdsall and George R. Brewer
U.S. Patent 2,985,793. May 1961
High frequency energy interchange device
Charles K. Birdsall and Curtis C. Johnson
U.S. Patent 2,976,456. March 1961
High frequency energy interchange device
Charles K. Birdsall and Ward A. Harman
U.S. Patent 2,976,455. March 1961
High frequency energy interchange device
Charles K. Birdsall and Curtis C. Johnson
U.S. Patent 2,976,454. March 1961
High power microwave tube
Charles K. Birdsall
U.S. Patent 2,957,103. October 1960
Traveling wave amplifier
Charles K. Birdsall
U.S. Patent 2,935,640. May 1960
High-power traveling-wave tube
Charles K. Birdsall
U.S. Patent 2,921,223. January 1960
Electron gun
Charles K. Birdsall
U.S. Patent 2,921,215. January 1960
Linear magnetron traveling wave tube
Charles K. Birdsall and Lester M. Field
U.S. Patent 2,896,117. July 1959
Traveling-wave tube
Charles K. Birdsall and Samuel Sensiper
U.S. Patent 2,889,487. June 1959
Microwave tube
Charles K. Birdsall and Lester M. Field
U.S. Patent 2,885,641. May 1959
Low-noise microwave tube
Thomas E. Everhart and Charles K. Birdsall
U.S. Patent 2,870,367. January 1959
Microwave tube
Charles K. Birdsall and Dean A. Watkins
U.S. Patent 2,859,374. November 1958
Traveling-wave tube
Charles K. Birdsall and Lester M. Field
U.S. Patent 2,853,642. September 1958
Traveling wave tube of high forward wave impedance
Charles K. Birdsall
U.S. Patent 2,851,631. September 1958
High power traveling-wave tube
Charles K. Birdsall
U.S. Patent 2,851,630. September 1958
Electron gun
Charles K. Birdsall
U.S. Patent 2,831,141. April 1958
Brillouin flow electron gun
Charles K. Birdsall
U.S. Patent 2,817,035. December 1957
Traveling-wave tube
George R. Brewer, Horace R. Johnson and Charles K. Birdsall
U.S. Patent 2,811,663. October 1957
Microwave tube
Charles K. Birdsall
U.S. Patent 2,811,641. October 1957
Resistive-inductive wall amplifier tube
Andrew V. Haeff and Charles K. Birdsall
U.S. Patent 2,793,315. May 1957