Active Resonator System with Tunable Quality Factor, Frequency, And Impedance

Tech ID: 24161 / UC Case 2014-182-0

Patent Status

Country Type Number Dated Case
United States Of America Issued Patent 10,530,337 01/07/2020 2014-182

Brief Description

The increasing role of wireless technology is driving the need for reducing power consumption of wireless devices. The high-Q SAW and FBAR vibrating mechanical devices used for current RF band-pass filters are responsible for significant power savings. Still, there is room for improvement.

To address this situation, researchers at UC Berkeley have developed an active resonator system with tunable quality factor, frequency, and impedance. Coupling two or more of these Berkeley resonators together enables construction of filters with arbitrarily small adjustable bandwidths and tunable insertion loss thereby achieving significant advantage over traditional filters constructed from passive resonators.


All wireless applications including cellular handsets, Bluetooth devices, and future short range sensor networks.


  • Reduces power requirements and manufacturing costs
  • Improves performance of existing wireless systems
  • Allows narrow bandwidth operation
  • Increases yield and simplifies trimming requirements


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  • Nguyen, Clark Tu-Cuong

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