Filter device and method for manufacturing the same

Details Filter device and method for manufacturing the same Filter device and method for manufacturing the same

2011-03-22

2011-03-22

Jones, Stephen E (Department: 2817)

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

C333S222000

Reexamination Certificate

active

07911297

ABSTRACT:
A filter device having a frame made of plated steel sheet generates a smaller insertion loss and is excellent in productivity. Resonant elements are shaped into a cylindrical form by bending the steel sheet, whose both sides are plated, before they are placed in a filter housing. A gap formed on a lateral face of each resonant element is brazed with solder, and an outer plated face of each resonant element is brazed with solder to an inner plated face of the frame.

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International Search Report issued Nov. 6, 2007 in the International (PCT) Application of which the present application is the U.S. National Stage.

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