Publications

Bird, TS 1993, 'Going Strong After 50 Years: Antenna R&D at the CSIRO Division of Radiophysics', IEEE Antennas and Propagation Magazine, vol. 35, no. 2, pp. 39-48.
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DAJANI, I, MORSE, EC & ZIOLKOWSKI, RW 1993, 'WEAKLY NONLINEAR GEOMETRICAL-OPTICS IN PLASMAS', PHYSICA D, vol. 64, no. 1-3, pp. 237-250.
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DONNELLY, R & ZIOLKOWSKI, RW 1993, 'DESIGNING LOCALIZED WAVES', PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, vol. 440, no. 1910, pp. 541-565.
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Guo, YJ & Barton, SK 1993, 'Fresnel Zone Plate Reflector Incorporating Rings', IEEE Microwave and Guided Wave Letters, vol. 3, no. 11, pp. 417-419.
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A novel high-efficiency Fresnel zone plate reflector antenna is presented. The reflector consists of an inhomogeneous array of circular conducting rings printed on a grounded substrate. By adjusting the geometrical parameters of the rings and the distances between them, the reflector provides a space-varying phase correction required for focusing an incoming plane wave. Compared with a phase reversal zone plate, an average of 3-dB gain improvement and significant sidelobe reduction have been obtained. © 1993 IEEE

Guo, YJ & Barton, SK 1993, 'Multilayer phase correcting fresnel zone plate reflector antennas', International Journal of Satellite Communications, vol. 11, no. 2, pp. 75-80.
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Owing to its flat nature and light weight etc., the Fresnel zone plate antenna is becoming very attractive for such applications as DBS reception and receive‐only VSAT. The disadvantages of low efficiency and high sidelobes of the simple and the phase reversing zone plates can be improved by using phase correcting techniques. In this paper, a systematic investigation on the efficiency and sidelobe performance of subzone phase correcting zone plate antennas is presented. The design of a form of multilayer phase correcting zone plate reflector is described. A quarter‐wave zone plate reflector constructed with three dielectric layers and metallized rings is reported, with measured peak efficiency of 55 per cent. Copyright © 1993 John Wiley & Sons, Ltd.

Guo, YJ & Barton, SK 1993, 'On the subzone phase correction of fresnel zone plate antennas', Microwave and Optical Technology Letters, vol. 6, no. 15, pp. 840-843.
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Subzone phase correction is a practical technique to produce high‐efficiency Fresnel zone plate antennas. In this article a strict theory underlying the technique is presented. A closed‐form expression of the focal field for the subzone phase correcting Fresnel zone plate (FZP) illuminated by a plane wave is given first. The subzone division and the corresponding phase correction are then optimized to produce the maximum focal field intensity. To overcome the difficulty of placing many subzone phase shifters in the narrow outer full‐wave zones, an aperiodic subzone phase correction technique is proposed. Copyright © 1993 Wiley Periodicals, Inc., A Wiley Company

LICHTENBERG, B, GALLAGHER, NC & ZIOLKOWSKI, RW 1993, 'CLOSED-FORM, LOCALIZED WAVE SOLUTIONS IN OPTICAL-FIBER WAVE-GUIDES - COMMENT', JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION, vol. 10, no. 9, pp. 2090-2091.
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Veitch, D 1993, 'The approach to constrained equations', Physics Letters A, vol. 183, pp. 319-326.

ZIOLKOWSKI, RW 1993, 'PROPERTIES OF ELECTROMAGNETIC BEAMS GENERATED BY ULTRA-WIDE BANDWIDTH PULSE-DRIVEN ARRAYS - REPLY', IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, vol. 41, no. 4, pp. 520-522.

ZIOLKOWSKI, RW & JUDKINS, JB 1993, 'APPLICATIONS OF THE NONLINEAR FINITE-DIFFERENCE TIME-DOMAIN (NL-FDTD) METHOD TO PULSE-PROPAGATION IN NONLINEAR MEDIA - SELF-FOCUSING AND LINEAR-NONLINEAR INTERFACES', RADIO SCIENCE, vol. 28, no. 5, pp. 901-911.
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Ziolkowski, RW & Judkins, JB 1993, 'Full-wave vector maxwell equation modeling of the self-focusing of ultrashort optical pulses in a nonlinear kerr medium exhibiting a finite response time', Journal of the Optical Society of America B: Optical Physics, vol. 10, no. 2, pp. 186-198.
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The extension of the conventional finite-difference time-domain solution of the full vector Maxwell equations to modeling femtosecond optical-pulse propagation in a nonlinear Kerr medium that exhibits a finite response time is presented. Numerical results are given for nonlinear self-focusing in two space dimensions and time; the technique can be generalized to three space dimensions with adequate computer resources. Comparisons with previously reported and anticipated results are made. Several novel phenomena that are not observed with scalar models of self-focusing and that can be attributed only to the complete solution of the vector Maxwell equations are discussed. © 1993 Optical Society of America.

ZIOLKOWSKI, RW, BESIERIS, IM & SHAARAWI, AM 1993, 'APERTURE REALIZATIONS OF EXACT-SOLUTIONS TO HOMOGENEOUS-WAVE EQUATIONS', JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION, vol. 10, no. 1, pp. 75-87.
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Batchelor, RA, Archer, JW, Bird, TS, Giugni, S, Kot, JS, Nikolic, N, Ostry, DI, Percival, TM & Young, AC 1993, 'Australian activities in microwave links for wireless LANs', IEEE MTT-S International Microwave Symposium Digest, pp. 677-680.
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The evolution of wireless connectivity will need to keep pace with the decrease in size of portable computers and the increase in available computing power. Relatively low bitrate systems are now commonly available, and faster, second-generation systems are under development. In Australia, a program centred at the CSIRO Division of Radiophysics aims to develop third-generation wireless systems with capacities of order 100 Mbits per second in a cell. This paper discusses some of the issues relating to the design of millimetre-wave antennas and transceiver MMICs for operation at frequencies near the 60 GHz ISM band.

GUO, YJ & BARTON, SK 1992, 'HIGH-EFFICIENCY ZONE-PLATE REFLECTOR INCORPORATING PRINTED RESONATORS', EIGHTH INTERNATIONAL CONFERENCE ON ANTENNAS AND PROPAGATION, PTS 1 AND 2, 8TH INTERNATIONAL CONF ON ANTENNAS AND PROPAGATION, INST ELECTRICAL ENGINEERS, HERIOT WATT UNIV, EDINBURGH, SCOTLAND, pp. 620-622.

Veitch, D 1993, 'Novel models of broadband traffic', Global Telecommunications Conference, 1993, including a Communications Theory Mini-Conference. Technical Program Conference Record, IEEE in Houston. GLOBECOM’93., IEEE, IEEE, pp. 1057-1061.

ZIOLKOWSKI, RW 1992, 'ULTRA-WIDE BANDWIDTH, MULTI-DERIVATIVE ELECTROMAGNETIC SYSTEMS', ULTRA-WIDEBAND, SHORT-PULSE ELECTROMAGNETICS, 2nd WRI International Conference on Ultra-Wideband Short-Pulse Electromagnetics, PLENUM PRESS DIV PLENUM PUBLISHING CORP, POLYTECH UNIV, BROOKLYN, NY, pp. 251-258.