Joseph J. Ratke

Chief Engineer

Department of Biophysics
Medical College of Wisconsin
8701 Watertown Plank Road
Milwaukee, WI 53226-0509
(414) 955-4021
(414) 955-6512 (fax)

Research Interests

Mr. Ratke received his BS degree from the Milwaukee School of Engineering in 1980 and has been employed by the Department of Biophysics (and its predecessors) at the Medical College of Wisconsin since 1978. He has completed some MS-level work at Marquette University in the area of digital signal processing.

Areas of interest include:

  • A/D conversion
  • Signal processing
  • Instrument control
  • Computer programming
  • Computer networking

EPR projects include:

  • Digital phase detection
  • Saturation recovery receiver systems
  • The SUMSPC program
  • The version of VIKING for PCs
  • Spectrometer control


Kittell AW, Camenisch TG, Ratke JJ, Sidabras JW, Hyde JS. Detection of undistorted continuous wave (CW) electron paramagnetic resonance (EPR) spectra with non-adiabatic rapid sweep (NARS) of the magnetic field. J Magn Reson. 2011 Aug;211(2):228-33. Epub 2011 Jun 13.

Hyde JS, Strangeway RA, Camenisch TG, Ratke JJ, Froncisz W. W-band frequency-swept EPR. J Magn Reson. 2010 Jul;205(1):93-101. Epub 2010 Apr 13.

Froncisz W, Camenisch TG, Ratke JJ, Anderson JR, Subczynski WK, Strangeway RA, Sidabras JW, Hyde JS. Saturation recovery EPR and ELDOR at W-band for spin labels. J. Magn. Reson. 193:297-304 (2008).

Hyde JS, Yin J-J, Subczynski WK, Camenisch TG, Ratke JJ, Froncisz W. Spin label EPR T1 values using saturation recovery from 2 to 35 GHz. J. Phys. Chem. B 108:9524-9529 (2004).

Froncisz W, Camenisch TG, Ratke JJ, Hyde JS. Pulse saturation recovery, pulse ELDOR and free induction decay EPR detection using time-locked subsampling. Rev. Sci. Instrum. 72:1837-1842 (2001).

Hyde JS, Mchaourab HS, Camenisch TG, Ratke JJ, Cox RW, Froncisz W. Electron paramagnetic resonance detection by time-locked subsampling. Rev. Sci. Instrum. 69:2622-2628 (1998).

Hyde JS, Jesmanowicz A, Ratke JJ, Antholine WE. Pseudomodulation: A computer-based strategy for resolution enhancement. J. Magn. Reson. 96:1-13 (1992).