Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1997-12-02
1999-09-14
Ham, Seungsook
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
333207, 333134, H01P 1205, H01P 512
Patent
active
059529008
ABSTRACT:
A ceramic transverse-electromagnetic-mode filter having a resistive paste base and resistive paste layer and method of tuning same is provided. The ceramic filter includes a filter body (200) comprising a block of dielectric material and having top (202), bottom (204) and four side surfaces (206, 208, 210, 212) including vertical edges (214). The filter also has metallized through-holes providing transverse-electromagnetic-mode resonators (210). At least one vertical portion in proximity to the vertical edges (214) of the block on at least one of the side surfaces is unmetallized providing a resistive paste base (218). A resistive paste layer (219) of predetermined resistivity is deposited thereon. The resistive paste layer attenuates a set of parasitic spurious responses in the filter frequency response curve while simultaneously maintaining a desired transverse-electromagnetic-mode passband.
REFERENCES:
patent: 4344053 (1982-08-01), Anderson
patent: 5150089 (1992-09-01), Komazaki et al.
patent: 5416454 (1995-05-01), McVeety
patent: 5436602 (1995-07-01), McVeety et al.
patent: 5537085 (1996-07-01), McVeety
Djordjevic Antonije
Hoang Truc
Vangala Reddy
CTS Corporation
Ham Seungsook
LandOfFree
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