Filter with improved capacitive coupling portion

Details Filter with improved capacitive coupling portion Filter with improved capacitive coupling portion

2008-05-27

2008-05-27

Pascal, Robert J. (Department: 2817)

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

C333S134000, C333S219000

Reexamination Certificate

active

11046942

ABSTRACT:
A filter is provided which comprises a single dielectric, and a line conductor and a ground conductor disposed on the dielectric. The line conductor includes first and second line conductor sections having opposed portions defining an open gap therebetween to form a capacitive coupling section. The edge lines of the opposed portions of the first and second conductor sections defining the open gap therebetween are substantially elongated relative to the line width of the corresponding conductor sections. The thus constructed filter is capable of suppressing a variation in the normalized J-inverter value even if dimensional errors relative to the design specifications due to overetching or underetching involved during the manufacture.

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