Waveguide filter with coaxial/waveguide mode conversion

Details Waveguide filter with coaxial/waveguide mode conversion Waveguide filter with coaxial/waveguide mode conversion

1992-09-17

1995-03-14

Ham, Seungsook

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333239, H01P 1207

Patent

active

053980093

ABSTRACT:
In order to improve filter loss of a waveguide filter having coaxial/waveguide mode conversion parts at its ends, conductor posts bridging a space between two long sides of the waveguide are provided between the parts and the ends. The conductor posts have sufficient thickness and remain close enough to each other and to short ends of the waveguide that a partition plane including axes of the conductor posts can be regarded as an imaginary short plane. The conductor posts are located so that the partition plane is positioned at a distance .lambda./4.times.n (n=1, 3, 5 . . . ) from the coaxial/waveguide mode conversion part.

REFERENCES:
patent: 2588103 (1952-03-01), Fox
patent: 2629015 (1953-02-01), Reed
patent: 2829352 (1958-04-01), Hennies et al.
patent: 2975380 (1961-03-01), Scharfman
patent: 2985852 (1961-05-01), Cowcher et al.
patent: 3617956 (1971-11-01), Bastikar
patent: 3657670 (1972-04-01), Kitazume et al.
patent: 4631503 (1986-12-01), Brown
Patent Abstracts of Japan, vol. 6, No. 251 (E-147) 10 Dec. 1982 & JP-A-57 148403 (Yagi Antenna K.K.) 13 Sep. 1982.

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