HIGH-SELECTIVITY PIEZOELECTRIC BAND FILTER Russian patent published in 2004 - IPC

FIELD: radio electronics, communications engineering, and measurement technology.

SUBSTANCE: proposed filter has input and output sections 1,2 identical in their circuit arrangement, each section incorporating inductance coil 3 and piezoelectric resonator 4, and also capacitors 5 through 10. In addition circuit set up of N piezoelectric resonators is inserted between input and output sections, where N = 1, 2, 3 is any integer number; piezoelectric resonators are interconnected in series and their leads are connected through N + 1 capacitors to common bus.

EFFECT: improved filter selectivity and manufacturability.

2 cl, 2 dwg