Parallel multistage band-pass filter

Details Parallel multistage band-pass filter Parallel multistage band-pass filter

2005-07-05

2005-07-05

Ham, Seungsook (Department: 2817)

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

C333S202000, C333S204000, C333S206000

Reexamination Certificate

active

06914497

ABSTRACT:
In a parallel multistage band-pass filter, a transmission line having an electrical length substantially equal to half (λ/2) of the wavelength of the transmission signal is incorporated between the port on the input terminal side of the odd number (2n−1)th resonator numbered from the input terminal side and the port on the input terminal side of the even number (2n)th resonator numbered from the input terminal side; and a transmission line having an electrical length substantially equal to λ/2 is incorporated between the port on the output terminal side of the even number (2n)th resonator numbered from the input terminal side and the port on the output terminal side of the odd number (2n+1)th resonator numbered from the input terminal side. Moreover, a transmission line for adjustment of a transmission phase between the input terminal and the output terminal is incorporated between the first resonator numbered from the output terminal side and the output terminal.

REFERENCES:
patent: 5184096 (1993-02-01), Wakino et al.
patent: 5502421 (1996-03-01), Nakahara
patent: 6512427 (2003-01-01), Nakano
patent: 6518854 (2003-02-01), Kayano et al.
patent: 6621370 (2003-09-01), Dao
patent: 1148576 (2001-10-01), None
patent: 1062269 (1967-03-01), None
patent: 03-072701 (1991-03-01), None

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