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