Comb generator, device and process for calibrating measurement s

Details Comb generator, device and process for calibrating measurement s Comb generator, device and process for calibrating measurement s

1992-07-17

1997-01-14

Hajec, Donald

Communications: radio wave antennas

Antennas

Measuring signal energy

455115, G01R 2908

Patent

active

055944582

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1. Field of the Invention
The invention relates to a process for calibrating measurement sections for measuring the interference field strength of electrical devices, for example for determining calibration factors for measuring the interference field strength by means of the frequency spectrum, in particular up to 1 GHz, where fields are generated by means of a comb generator in a known reference measurement section, for example a standard measurement section or an open air test site, and in a measurement section to be measured, with one and the same calibration device (radio interference emitter), in particular with the same operating parameters, these fields are each measured in the same way and the calibration factors are calculated from the comparison of the measured values as a function of the frequency. Finally, the invention also relates to a process for determining the calibration factors of a measurement section or a process for simulating the interference emissions of test object or actual electrical devices.
The invention furthermore relates to a comb generator with a possibly battery-operated oscillator to power an antenna. Furthermore, the invention relates to a calibrating device for measuring devices or measurement sections for interference field strength measurements, comprising a battery-operated comb generator, possibly of the type of the invention, which comb generator is employed for powering the antenna and which is particularly free of metallic conductors. Furthermore, the invention relates to a radio interference simulator, also with a possibly battery-operated comb generator.
2. Discussion of the Background of the Invention and Material Information
Processes for calibrating measurement sections for interference field strength measurements of electrical devices are known to the extent that in a known reference measurement section the measuring data are obtained from a single transmitting antenna and appropriate measurements are taken in the measurement section to be calibrated at the same radio interference transmitter and the appropriate calibration factors are obtained from a comparison of the two measurements. Such a process is known, for example, from e&i-Elektrotechnik & Informationstechnik (e&i Electrical Technology & Information Technology), Vol. 106 (1989), No. 4, pp. 134 to 145, or IEEE 1989 National Symposium on Electromagnetic Compatibility, May 23-25, p. 391, column 1. A similar process is known from 1986 IEEE International Symposium on Electromagnetic Compatibility, Sep. 16-18, 1986, pp. 362 to 365.
A direction-finding antenna system, using a dipole and a coil antenna is known from German Patent Document DE-A-2 602 476 which, however, cannot be used for calibration purposes.
The triggering of at least two antennas having different transmitting characteristics for improving the response properties of a radar installation is known from Patent Abstracts of Japan, Vol. 9, No. 210 (P-383) 1938, Aug. 28, 1985; however, such a radar installation cannot be used for calibrating measurements of the type mentioned.
Finally, the use of a bipolar transistor operated in a controlled avalanche breakthrough mode, the frequency-stable signal of which obtained during breakthrough extends up to 1 GHz, for providing a pulse generator is known from Q.S.T. amateur radio, Vol. 56, No. 5, May 1972, pp. 15, 16. The use of such transistors for comb generators or the use of such pulse generators for powering antennas for calibrating purposes, however, cannot be found in this reference.
Electrical and electronic devices generate electromagnetic fields. This is a result of the physical fact that every electrical current which can be changed over time results in the emission of electromagnetic waves.
In the case of a radio transmitter, these waves are generated on purpose and are desirable (radio waves). Electrical currents which can be changed over time are also employed or generated in electrical or electronic devices, for example in computers, household devices or the

REFERENCES:
patent: 1982331 (1934-11-01), Taylor
patent: 3296533 (1967-01-01), Karpinsky
patent: 4468669 (1984-08-01), Wang et al.
patent: 4498193 (1985-02-01), Richardson
patent: 4864636 (1989-09-01), Brunius
patent: 5086508 (1992-02-01), Furuno
H. G. Ove, Elektrotechnik & Informationstechnik, vol. 106, No. 4, Apr. 1989, pp. 134-145.
S. A. Stone, 1986 IEEE International Symposium on Electromagnetic Compatibility, Sep. 1986, pp. 362-365.
H. Garn, IEEE 1989 National Symposium on Electromagnetic Compatibility, May 1989 pp. 390-393.
G. S. Pettit et al., IEEE 1985 International Symposium on Electromagnetic Compatibility, Aug. 1985, pp. 176-182.
J. R. Andrews, Q.S.T. Amateur Radio, vol. 56, May 1972, pp. 16-18.
Masanobu Kominami et al., IEEE Transactions of Antennas and Propagation, AP-32. No. 2, Feb. 1984, pp. 154-158.
International Search Report in connection with International Application No. PCT/AT 90/00119.

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