Joseph J. Ratke

Chief Engineer, Department of Biophysics

Research Interests

I received my BS degree from the Milwaukee School of Engineering in 1980 and has been employed by the Department of Biophysics (and its predecessors) at MCW since 1978. I have 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
  • Spectrometer control


Mainali L, Sidabras JW, Camenisch TG, Ratke JJ, Raguz M, Hyde JS, Subczynski WK. Spin-label W-band EPR with seven-loop–six-gap resonator: application to lens membranes derived from eyes of a single donor.  App Magn Reson. (2014) 45:1343–58. PMC4273494

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) 211:228–33. PMC3148028

Hyde JS, Strangeway RA, Camenisch TG, Ratke JJ, Froncisz W. W-band frequency-swept EPR. J. Magn. Reson. (2010) 205:93–101. PMC2885579

Camenisch TG, Ratke JJ, Strangeway RA, Hyde JS. A versatile Q-band electron paramagnetic resonance spectrometer. Electro/Information Technology Conference, 2004. EIT 2004. IEEE, pp. 66–81.

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. (2008) 193:297–304. PMC2561891

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. (2004) 108(27):9524–9.

Hyde JS, Camenisch TG, Ratke JJ, Strangeway RA, Froncisz W. Digital Detection by Time-Locked Sampling in EPR, in: Biological Magnetic Resonance, Volume 24: Biomedical EPR - Part B: Methodology and Instrumentation (Eaton, S.S., Eaton, G.R., Berliner, L.J. eds.) Kluwer Academic/Plenum Publishers, New York, NY, 2005, pp.199–222.

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. (2001) 72:1837–42.

Hyde JS, Mchaourab HS, Camenisch TG, Ratke JJ, Cox RW, Froncisz W. Electron Paramagnetic Resonance Detection by Time-Locked Subsampling. Rev Sci Instrum. (1998) 69:2622-8.

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