Integrated filter and impedance matching network

Details Integrated filter and impedance matching network Integrated filter and impedance matching network

2005-04-12

2005-04-12

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Coupling networks

Electromechanical filter

C333S193000

Reexamination Certificate

active

06879224

ABSTRACT:
A filter and impedance matching network uses acoustic resonators in place of capacitors. A resonator, e.g. FBAR, behaves similar to a capacitor outside of its resonant frequency and so does not impact the function of the network, outside of its resonant frequency. At this resonant frequency, the resonator quickly transitions from capacitor to short circuit to open circuit and back to capacitor. Thus, the will deliver open and short circuits independent of the standard LC filter resulting in a structure with an additional notch, a notch with the characteristics delivered by a very high quality resonator. This notch can be much sharper and closer to the pass band than is possible with ordinary inductors and capacitors.

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