Patent ID: 6545565
Filing Date: 2003-04-08
Classification: H01P

Abstract:
An antenna sharing device comprising:a filter comprising a plurality of resonance circuits; each resonance circuit comprising a respective resonator and a respective capacitor plate; electrodes being disposed on said capacitor plate and electrically connected to said resonator so as to form a trap capacitor and a frequency control capacitor of said resonance circuit; a first input/output terminal connected to said filter; a second filter; a second input/output terminal connected to said second filter; a common input/output terminal connected to both said filter and said second filter; wherein said second filter includes a plurality of resonance circuits, each resonance circuit comprising respectively a resonator, a trap capacitor and a frequency control capacitor; and a common capacitor plate being associated with more than one of said resonance circuits, the respective trap capacitors and frequency control capacitors of said more than one resonance circuit being formed by electrodes disposed on said common capacitor plate.