Filter unit

Details Filter unit Filter unit

2011-03-01

2011-03-01

Jones, Stephen E (Department: 2817)

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

C333S211000

Reexamination Certificate

active

07898368

ABSTRACT:
A filter unit comprises a cover and a base. The cover includes a number of first grooves, and the base includes a number of second grooves aligned with the first grooves. At least one of the cover or the base includes an alloy of zinc and aluminum, wherein the weight percentage of zinc is greater than that of aluminum.

REFERENCES:
patent: 3777286 (1973-12-01), Cramm et al.
patent: 5739734 (1998-04-01), Chen et al.
patent: 6809696 (2004-10-01), Bergmark et al.
patent: 2004/0017272 (2004-01-01), Smith et al.

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