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Electrical and Computer Engineering

College of Engineering and Applied Science

Dr. Eva Ferre-Pikal's Research

> Visit Dr. Ferre-Pikal's webpage

Microwave and RF electronics, noise in high frequency circuits

Our main area of research is the investigation of noise processes in high frequency amplifiers, oscillators, frequency dividers and multipliers, and other devices.  Specifically we study the phase modulation noise (PM noise) and amplitude modulation noise (AM noise) in these high frequency devices. High frequency oscillators and amplifiers play an important role in today’s technology.  They are important components of state-of-the-art navigation systems, radar systems, electronic equipment, and telecommunications systems; and can limit the performance of these systems.
Ferrepikal
For example, in some radar systems, the range or maximum distance at which a target can be detected is limited by PM noise and AM noise of the oscillator in the transmitter and/or PM noise in the receiver.   Our laboratory is equipped with state-of-the-art, cross-correlation measurement systems for characterizing PM and AM noise of high frequency devices.

Current interests include:

  1. Study of PM and AM noise in heterojunction bipolar transistors (HBT) amplifiers.  This includes modeling of noise in these amplifiers (both in the linear and non-linear regions) and investigating techniques for reducing amplifier phase and amplitude noise.
  2. Study of PM and AM noise in High Electron Mobility Transistor (HEMT) amplifiers.  This includes modeling of noise in these amplifier (both in the linear and non-linear regions) and investigating techniques for reducing amplifier phase and amplitude noise.
  3. Study of noise in microwave resonators.  In many cases, PM noise in microwave oscillators is limited by resonator noise, which can be very difficult to measure.  It is important to be able to characterize this noise for different resonator designs to help understand parameters affecting the noise.

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Electrical and Computer

Engineering, EN 5068

Dept. 3295

1000 E. University Ave.

Laramie, WY 82071

Phone: (307)766-2279

Email: ece@uwyo.edu

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