Patent ID: 7898361

Claim:
An antenna feed coupling structure of a duplexer, comprising: a base, said base comprising a resonance cavity, a plurality of upright resonators mounted in said resonance cavity, a T-shaped feed-in cavity perpendicularly intersecting said resonance cavity, a signal input port cut through a bottom wall thereof and connected to a top of said T-shaped feed-in cavity remote from said resonance cavity for signal input; and a cover covering said base to close said resonance cavity and said T-shaped feed-in cavity, said cover comprising a plurality of through holes respectively disposed in communication with said resonance cavity and said T-shaped feed-in cavity, and a plurality of adjustment rods respectively mounted in said through holes and adjustable upwards and downwards relative to said resonance cavity and said T-shaped feed-in cavity, said adjustment rods comprising two feed-in adjustment rods and two coupling structure adjustment rods suspending in the intersected area between said resonance cavity and said T-shaped feed-in cavity, said feed-in adjustment rods being aligned in a first direction and adjustable to adjust the feed-in amount of the antenna feed coupling structure, said coupling structure adjustment rods being aligned in a second direction perpendicular to said first direction and adjustable to adjust the coupling structure amount of the antenna feed coupling structure.