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Publications (2)1.33 Total impact

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    ABSTRACT: Corona on electrified conductors (power lines, transmission lines, and antennas) is a significant source of electromagnetic interference to aircraft. The Townsend integral, which describes breakdown in low-frequency nonuniform fields, is derived from the electron continuity equation. Predictions of corona onset are made using published formulas for net ionization. Measurements of 60-Hz corona onset for an isolated cylindrical monopole are compared with predictions. A corona onset criterion, which describes breakdown in nonuniform radio-frequency fields, is also derived from the electron continuity equation. Measurements of corona onset at 300 MHz for the same isolated cylindrical monopole are compared with predictions. The results confirm that the derived breakdown criteria are good predictors of corona onset both at 60 Hz and 300 MHz for cylindrical geometries in the range ${bf 0.1}leq rp leq {bf 10}$ cm $cdot$ torr. A discussion of the transition frequency between power frequency and high-frequency corona onset is also included.
    IEEE Transactions on Electromagnetic Compatibility 09/2008; · 1.33 Impact Factor
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    ABSTRACT: Corona on antennas or transmission lines is a significant source of electromagnetic interference on aircraft. A corona onset criterion, which describes breakdown in nonuniform RF fields, is derived from the Boltzmann transport equation. Predictions of corona onset are made using recent formulae for net ionization. Measurements of 300 MHz corona onset for an isolated, cylindrical electrode were made and are compared with predictions. The results confirm that the derived breakdown criterion is a good predictor of RF corona onset at 300 MHz for cylindrical geometries where diffusion is the dominant electron loss mechanism in the range 0.1 les rp les 10 cm-torr.
    Electromagnetic Compatibility, 2007. EMC 2007. IEEE International Symposium on; 08/2007