Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Reexamination Certificate
2009-07-09
2011-11-22
Ham, Seungsook (Department: 2817)
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
C455S339000
Reexamination Certificate
active
08063724
ABSTRACT:
A band-pass filter includes an input port, an output port, and a plurality of resonators. The input port is utilized for receiving a radio frequency signal. The output port is utilized for outputting a filtered signal. The plurality of resonators are placed between the input port and the output port, and are utilized for band-pass filtering the radio frequency signal for generating the filtered signal, wherein the plurality of resonators comprise at least two different trace widths for matching the output impedance of the band-pass filter with the input impedance of a rear-stage circuit coupled to the output port.
REFERENCES:
patent: 3754198 (1973-08-01), Anghel
patent: 5187459 (1993-02-01), Russell et al.
patent: 5404119 (1995-04-01), Kim
patent: 6222500 (2001-04-01), Koitsalu et al.
patent: 6559741 (2003-05-01), Takeda
patent: 6642816 (2003-11-01), Tsujiguchi et al.
patent: 2004/0246071 (2004-12-01), Rottmoser et al.
Cohn, “Parallel-Coupled Transmission-Line-Resonator Filters”, IRE Trans. on Microwave Theory & Techniques, pp. 223-231, 1958.
Tsai Wen-Tsai
Wang Che-Ming
Ham Seungsook
Hsu Winston
Margo Scott
Wistron NeWeb Corporation
LandOfFree
Self-matching band-pass filter and related frequency down... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Self-matching band-pass filter and related frequency down..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-matching band-pass filter and related frequency down... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4258553