Publications

BRAUN, RM 1991, 'CREATING SCIENTIFIC FORMULAS USING STANDARD WORD-PROCESSORS IS EASY', IEEE TRANSACTIONS ON EDUCATION, vol. 34, no. 1, pp. 138-139.
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This paper describes a method for entering scientific formulae into text using standard word processors. The described technique places a grid matrix on the screen into which the terms of the equation may be conveniently placed. The technique relies on

BRAUN, RM & MEYEROWITZ, GJ 1991, 'METEOR BURST COMMUNICATIONS .2. INVESTIGATION INTO ADAPTIVE-RATE MODEMS FOR METEOR BURST COMMUNICATION', ELECTRONICS & COMMUNICATION ENGINEERING JOURNAL, vol. 3, no. 5, pp. 213-222.
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Current meteor burst communication systems operate at constant bit rates of 4 kbit/s and are limited to average throughputs of 50 bit/s. The paper documents the design and implementation of an adaptive-bit-rate modem for optimising the throughput. A nove

Guo, YJ, Barton, SK & Wright, TMB 1970, 'Design of high efficiency Fresnel zone plate antennas', AP-S International Symposium (Digest) (IEEE Antennas and Propagation Society), pp. 182-185.
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With a family of ideal radiation patterns, the theory for designing high-efficiency phase-correcting FZP (Fresnel zone plate) antennas is presented. The optimum 3-dB beamwidth of the feed pattern as a function of F/D (focal length/diameter) of the plate, the relation between the phase efficiency of the antenna and the number of subzones used in each full-wave zone, and the total efficiency limits of various versions are given. It is found that the maximum efficiency of a practical FZP antenna is usually less than 70%. The theory has been employed in designing a four-layer experimental FZP reflector antenna, and good agreement between the theoretical expectation and the measured value is obtained.