Wave transmission lines and networks – Coupling networks – Frequency domain filters utilizing only lumped parameters
Reexamination Certificate
2008-09-16
2008-09-16
Jones, Stephen E (Department: 2817)
Wave transmission lines and networks
Coupling networks
Frequency domain filters utilizing only lumped parameters
Reexamination Certificate
active
11041187
ABSTRACT:
A filter is delineated that may have an input for receiving an input signal including a plurality of different frequencies and an output for passing an output signal within a first frequency band. The filter may include a circuit coupled between the input of the filter and the output of the filter such that the circuit may add one or more zeros within a second frequency band to increase attenuation of the input signal within the second frequency band. Portions of the filter may be employed to form such a circuit. The filter may be used by an electrical system employing the filter.
REFERENCES:
patent: 3628057 (1971-12-01), Mueller
patent: 4240052 (1980-12-01), Hallford et al.
patent: 4800347 (1989-01-01), Yorita et al.
patent: 4888568 (1989-12-01), Kawaguchi
patent: 5008956 (1991-04-01), Hemmie
patent: 5020149 (1991-05-01), Hemmie
patent: 5323115 (1994-06-01), Werner, Jr.
patent: 5523729 (1996-06-01), Nakai et al.
patent: 5530411 (1996-06-01), Nakata et al.
patent: 5831497 (1998-11-01), Yorita et al.
patent: 5936490 (1999-08-01), Hershtig
patent: 6064866 (2000-05-01), Lange
patent: 6122533 (2000-09-01), Zhang et al.
patent: 6236292 (2001-05-01), Hershtig
patent: 6342825 (2002-01-01), Hershtig
patent: 6448873 (2002-09-01), Mostov
patent: WO 99/29038 (1999-06-01), None
“Advanced Coupling Matric Synthesis Techniques for Microwave Filters,” Richard J. Cameron,; IEEE Transactions on Microwave Theory and Techniques, vol. 51, No. 1, Jan. 2003, pp. 1-10.
“Direct Synthesis of a New Class of Band Stop Filters,” Amari, S. and Rosenberg, U., EEE Transactions on Microwave Theory and Techniques, accepted Jun. 2003, pp. 1-13.
“New Narrow-Band Dual-Mode Bandstop Waveguide Filters,” Jing-Ren Qian and Wei-Chen Zhuang, IEEE Transactions on Microwave Theory and Techniques, vol. MTT-31, No. 12, Dec. 1983, pp. 1045-1050.
Jones Stephen E
Moss Allen J.
Squire Sanders & Dempsey LLP
Starkovich Alex
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