Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1985-08-16
1988-03-22
LaRoche, Eugene R.
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
333206, H01P 1205
Patent
active
047332085
ABSTRACT:
A dielectric filter comprises a cubic dielectric block in which a plurality of holes arranged in the longitudinal direction are formed vertically therethrough. On outer surfaces of the dielectric block, an outer conductor is formed except on the upper surface. On inner surfaces of a plurality of the holes, inner conductors constituting resonance elements in cooperation with the outer conductor are formed. Grooves are formed in the dielectric block between the adjacent resonance elements. Thereby, impedance of a part of a lengthwise direction of at least one of the adjacent resonance elements differs from that of the other part, at least in one of the even and odd modes. In order to have different impedances, notches may be formed on the dielectric block between the adjacent inner conductors or large and small diameter portions may be formed in the holes or further the two methods may be combined.
REFERENCES:
patent: 4386328 (1983-05-01), Masuda et al.
patent: 4431977 (1984-02-01), Sokola et al.
patent: 4506241 (1985-03-01), Makimoto et al.
patent: 4546333 (1985-10-01), Fukasawa et al.
Hiratsuka Toshiro
Ishikawa Youhei
Tsunoda Kikuo
LaRoche Eugene R.
Lee Benny
Murata Manufacturing Co. Ltd.
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