High frequency filter having a plurality of serially coupled fir

Details High frequency filter having a plurality of serially coupled fir High frequency filter having a plurality of serially coupled fir

1997-02-20

1999-04-20

Ham, Seungsook

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333205, H01P 1203

Patent

active

058960732

ABSTRACT:
A high frequency filter includes a dielectric plate 8, an outer conductor 9 formed on the one surface of the dielectric plate 8, a plurality of strip conductors 10a-10d formed approximately in parallel on the other surface of the dielectric plate 8, a strip conductor 15 formed in a direction crossing the strip conductors 10a-10d, short-circuiting portions 11 and 16 connecting the one ends of the strip conductors 10a-10d and the strip conductor to the outer conductor 9, respectively, and further comprises a plurality of resonators 110a-110d constructed by the strip conductors 10, a plurality of capacitors (gaps) 12 coupling the resonators to each other to be connected in series, capacitors 13 connecting the strip conductors 10a, 10d to an input terminal and an outer conductor, respectively, a resonator 200 constructed by the strip conductor 15, and a plurality of capacitors (gaps) 33 connecting the strip conductors 10a, 10d to the resonator 200.

REFERENCES:
patent: 4418324 (1983-11-01), Higgins
patent: 4423396 (1983-12-01), Makimoto et al.
patent: 5344695 (1994-09-01), Hirai et al.
patent: 5525942 (1996-06-01), Horii et al.
patent: 5543764 (1996-08-01), Turunen et al.
patent: 5648747 (1997-07-01), Grothe et al.

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