An Alternative Method for Determining the Antenna Factor of a Monopole
Keywords:
Antenna calibration, GTEM cell, monopole antenna, equivalent circuit substitution method.Abstract
In this study, the standard methods of monopole
antenna calibration are interrogated and the use of
alternative methods is investigated. For this purpose, the
GTEM cell has been used for two standard identical
monopole antenna calibrations. The dummy antenna
(≈10pF by ANSI, ≈12pF by CISPR), which is suggested as
standard methods in ANSI C.63.5 and CISPR 16.1.4 are
not appropriate to simulate the actual monopole. So
Manufacture Antenna Simulator (MAS) has been used as
an alternative equivalent circuit substitution method
(ECISM) of the rod. Good agreement between GTEM
measurement and ECISM is observed. Calibrations with
standard and alternative methods are performed and the
reliability of these methods is discussed in the frame of the
measurement results.
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References
ANSI C63.5 American National Standart for
Electromagnetic Compatibility-Radiated Emission
Measurements in Electromagnetic Interference (EMI)
Control-Calibration of Antennas (9 kHz-40 GHz), The
Institute of Electrical and Electronics Engineers, Inc,
New York, USA, 1998.
Branaugh E.L., Osburn J.D.M., “Measuring EMC
Antenna Factors in The GHz Transverse Electromagnetic
Cell,” IEEE Symposium Records, pp.229-231, Anaheim,
Calofornia, USA, 1992.
Türetken B., Yürekli A.İ., and M.Yazici, “Determining
Antenna Factors for EMC Measurements,” Turkish
Journal of Telecomunication, vol. 1, no. 2, pp.59-66,
SAE ARP 958, Electromagnetic Interference
Measurement Antennas, Standard Calibration
Requirements and Methods, Society of Automotive
Engineers (SAE), 1999.
CISPR 16-1-4: Specification for radio disturbance and
immunity measuring apparatus and methods, Edititon
1. 2004-05, IEC, 2004.
MIL-STD 461 E, Requirement for the Control of
Electromagnetic Interference Characteristics of
Subsystems and Equipment, Department of Defence,
USA, 1999.
Alexander M.J., “Calibration and Use of EMC
Antennas,” NPL, April 1977.
Randa J., “ Correction Factor for Nonplanar Incident
Field in Monopole Calibrations” IEEE Transactions on
Electromagnetic Compatibility, vol. 35, no. 1, 1993.
Hui P., “Small Antenna Measurements Using a GTEM
Cell” IEEE Antennas and Propagation Society
International Symposium, vol. 4, pp. 715 - 718, pp. 22-
, June 2003.
Icheln C., Vainikainen P., and Haapala P., “Application
of GTEM Cell to Small Antenna Measurements,”
Antennas and Propagation Society vol.1, pp. 546 – 549,
pp. 13-18, July 1997.
Foegelle M.D., “A statistical Approach to Measurement
Uncertainty,” Antenna Catalog Essential Equipment for
EMC Testing- EMCO, 1998
