Wave transmission lines and networks – Plural channel systems – Having branched circuits
Reexamination Certificate
2011-03-01
2011-03-01
Ham, Seungsook (Department: 2817)
Wave transmission lines and networks
Plural channel systems
Having branched circuits
C333S203000
Reexamination Certificate
active
07898361
ABSTRACT:
An antenna feed coupling structure of a duplexer is disclosed to include a base defining a detoured resonance cavity and a T-shaped feed-in cavity perpendicularly intersecting the resonance cavity and a signal input port in connection with the head of the feed-in cavity, a cover closing the base, and adjustment rods mounted in the base and suspending in the resonance cavity and the feed-in cavity. The adjustment rods include two feed-in adjustment rods and two coupling structure adjustment rods suspending in the intersected area between the resonance cavity and the feed-in cavity and respectively kept in horizontal and in vertical relative to the resonance cavity and rotatable inwards and outwards to adjust the feed-in amount and coupling structure amount of the antenna feed coupling structure respectively.
REFERENCES:
patent: 4890078 (1989-12-01), Radcliffe
patent: 4980662 (1990-12-01), Simon et al.
patent: 5751199 (1998-05-01), Shiau et al.
patent: 5894250 (1999-04-01), Ravaska et al.
Lee Chien-Chih
Peng Jen-Ti
Ham Seungsook
Universal Microwave Technology, Inc.
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