Ultra-high-frequency notch filter having an inductance set...

Details Ultra-high-frequency notch filter having an inductance set... Ultra-high-frequency notch filter having an inductance set...

2003-09-12

2008-09-23

Lee, Benny (Department: 2817)

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

C333S185000

Reexamination Certificate

active

07427904

ABSTRACT:
An ultra-high-frequency notch filter (100) comprises a capacitor (102) defining a conductive trace (106) on its body (103) and extending between its terminals (104). The trace has an inductance that forms a parallel LC circuit with the capacitance of the capacitor. When mounted on a printed circuit board (120) to connect two segments of a signal line (124), the notch filter and a ground plane (122) of the PCB form a virtual conductive loop having an inductance and a capacitance whose product is the center frequency of the notch of the notch filter. The center frequency is tuned by varying the width of the trace.

REFERENCES:
patent: 5186647 (1993-02-01), Denkmann et al.
patent: 5952607 (1999-09-01), Friesen et al.
patent: 6094112 (2000-07-01), Goldberger et al.
patent: 6147573 (2000-11-01), Kumagai et al.
patent: 6211754 (2001-04-01), Nishida et al.
patent: 6539253 (2003-03-01), Thompson et al.
patent: 2001-0000674 (2001-01-01), None
patent: 2001-0031161 (2001-04-01), None
patent: WO 99/19982 (1999-04-01), None

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