Electrical Engineering
      and Computer Sciences

Electrical Engineering and Computer Sciences


UC Berkeley


Research Projects

Real-Time Frequency Gating Spectrum Analyzer (CSSA)

Clark Nguyen1, Albert Pisano and Liwei Lin2

Defense Advanced Research Projects Agency Grant No. W31P4Q-09-I-0006

This project aims to develop the high-Q micromechanical devices and mechanical circuits needed to eventually realize a frequency gating spectrum analyzer [1] capable of taking a snapshot of the electromagnetic spectrum received by the antenna of a wireless receiver, then removing all interferers and forwarding only desired frequencies to subsequent demodulation processors. Removal of all interferers from the received energy greatly reduces the dynamic range required by demodulation processors, which in turn lowers power consumption by several orders of magnitude, making practical true software-defined radio or ultra-low power energy sensing receivers, both with unprecedented jam-resistance. This project is funded by the Defense Advanced Research Projects Agency (DARPA) under the Chip-Scale Spectrum Analyzers Program.

Figure 1
Figure 1: SEM of a radial-contour mode micromechanical disk filter capable of selecting a 0.06% bandwidth communication signal directly at RF [2].

C. T.-C. Nguyen, “Integrated micromechanical RF circuits for software-defined cognitive radio (invited plenary),” Proceedings, the 26th Symposium on Sensors, Micromachines & Applied Systems, Tokyo, Japan, Oct. 15-16, 2009, pp. 1-5.
S.-S. Li, Y.-W. Lin, Z. Ren, and C. T.-C. Nguyen, “An MSI micromechanical differential disk-array filter,” Dig. of Tech. Papers, the 14th Int. Conf. on Solid-State Sensors & Actuators (Transducers’07), Lyon, France, June 11-14, 2007, pp. 307-311.

1Principal Investigator
2UC Berkeley, Mechanical Engineering