Title :
Low-loss and lightweight on-board 20 GHz-band pill-box-type directional filter
Author :
Ohtomo, I. ; Kumazawa, H.
Author_Institution :
NTT Electrical Communications Laboratories, Yokosuka, Japan
Abstract :
An on-board channel multiplexer using pill-box-shaped TM310 travelling-wave cavities with high unloaded Q-factor has been developed in the 20 GHz band. The measured branching loss of a three-cavity filter is 0.27 dB at a resonant frequency of 19.99 GHz. The weight of the filter made of thin-walled super-Invar is 71 g. Its size is 4.5×4.6×5.1 cm.
Keywords :
Invar; microwave filters; waveguide components; 0.27 dB; 20 GHz; 5.1 cm; Q-factor; SHF; T M310; branching loss; characteristics; on-board channel multiplexer; pill-box-type directional filter; resonant frequency; thin-walled super-Invar; three-cavity filter; travelling-wave cavities; waveguide filters; weight;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19870418
