Afroditi V. Filippas, Ph.D. profile photo

Afroditi V. Filippas, Ph.D.

Associate Dean for Undergraduate Studies; Professor, Department of Electrical and Computer Engineering

Engineering West Hall, Room 334, Richmond, VA, UNITED STATES

(804) 827-4097

Professor Filippas' research focuses on signal processing and nonlinear statistical analysis techniques





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Industry Expertise

  • Education/Learning
  • Research

Areas of Expertise

Microwave and RF Modeling and SimulationSignal ProcessingMedical Devices


University of Patras

Diploma, Electrical Engineering


University of Texas

M.S.E., Electrical Engineering


University of Texas

Ph.D., Electrical Engineering



  • IEEE : Senior Member

Research Focus

Multiple Fundamental Frequency Pitch Detection for Real Time MIDI Applications(Link)


- Convert electrical guitar signal with multiple fundamental frequencies to MIDI control signals - Uses neural network binary trees to extract pitch features from a signal - Operates in real-time with low latency on a embedded platform

Selected Articles

Signal Processing of Electroencephalogram for the Detection of Attentiveness towards Short Training Videos | ResearchGate


This research has developed a novel method which uses an easy to deploy single dry electrode wireless electroencephalogram (EEG) collection device as an input to an automated system that measures indicators of a participant's attentiveness while they are watching a short training video. The results are promising, including 85% or better accuracy in identifying whether a participant is watching a segment of video from a boring scene or lecture, versus a segment of video from an attentiveness inducing active lesson or memory quiz. In addition, the final system produces an ensemble average of attentiveness across many participants, pinpointing areas in the training videos that induce peak attentiveness...

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The S-band transmitter design for the Institute of Accelerating Systems and Applications racetrack microtron | Particle Accelerator Conference


A high-power CW (continuous-wave) source, at 2380 MHz, for the IASA (Institute of Accelerating Systems and Applications), (Athens, Greece), Microtron is based on the CPI (Communications and Power Industries) type VKS-8270 multi-cavity klystron. The high-level DC power conditioning for the klystron uses an existing high-voltage transformer-rectifier (HVPS) and variable-voltage transformer (VVT), designed to operate from 60 Hz power, whereas the local power is at 50 Hz...

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Mode Matching Analysis of the Coplanar Microstripline on a Layered Dielectric Substrate | The University of Texas at Austin


In this project, mode matching was used to calculate the propagation constant and the characteristic impedance of a coplanar coupled microstrip line. The Striplines are considered to be perfect electric conductors of negligible thickness, and are separated from the ground plane by three layers of dielectric material. The layer with the higher dielectric constant is sandwiched between two layers of lower dielectric constants, such that the field is confined to this middle layer, which is called the 'conducting layer' of the microstrip line. By confining the field to this layer, losses at the metal conductor are minimized.

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