Filter structure including circuit board

Details Filter structure including circuit board Filter structure including circuit board

2005-07-19

2005-07-19

Jones, Stephen E. (Department: 2817)

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

C333S203000, C333S230000

Reexamination Certificate

active

06919782

ABSTRACT:
A cavity filter assembly is provided with at least one structural cavity wall comprising a circuit board. The circuit board may also contain other circuits and circuit elements such as trim capacitors, inductors, low noise amplifier circuits and power amplifiers that are part of the filter's function. Input and output coupling structures and connectors may also be provided on the circuit board. The circuit board may contain inter-stage coupling circuits, signal traces, and coupling pads/structures. Further embodiments are provided that incorporate test connectors and directional couplers on the circuit board. In yet other embodiments the filter's electrical characteristics are tunable with trim elements mounted on the circuit board, such as capacitors or inductors, in either mechanical or electrical manner. The filter's electrical characteristics may also be tunable with mechanical elements mounted through the circuit board.

REFERENCES:
patent: 4477785 (1984-10-01), Atia
patent: 5382931 (1995-01-01), Piloto et al.
patent: 5406236 (1995-04-01), Newell et al.
patent: 5714919 (1998-02-01), Satoh et al.
patent: 5874870 (1999-02-01), Nishiyama et al.
patent: 5898349 (1999-04-01), Hattori et al.
patent: 6078231 (2000-06-01), Pelkonen

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