Abstract：A set of calculable dipole antennas are developed from 30MHz to 1GHz, based on a set of commercially available precise dipole antennas and a set of specific S-parameters adaptors. The site insertion loss /site attenuation difference between simulating results and measurements is less than 0.9dB for different antenna heights, separations and frequencies. The antenna factor difference is less than 0.45dB accordingly. Because independent and more precise value can be computed from calculable dipole antennas, they are vital to solve the circular dilemma between OATS and antennas. The advantage of this solution is that calculable dipole antennas can be acquired based on some commercially available dipole antennas.
［1］Foegelle M D. Site Validation Theory 101: Techniques and Methods［EB/OL］. http://www.ets-lindgren.com/pdf/SiteValThe.pdf
［2］Alexander M, Salter M, Loader B. A dipole antenna with calculable gain over the frequency range 20 MHz to 2.2 GHz［C］//EuCAP. Proceedings of the European Conference on AntePropagation 'EuCap 2006', Nice, France, 2006.
［3］Alexander M, Salter M, Loader B, et al. Broadband Calculable Dipole Reference Antennas［J］. IEEE Transactions on Electromagnetic compatibility, 2002,44(11): 45－58.
［4］Garn H, Buchmayr M, Müllner Ｗ. Tracing Antenna Factors of Precision Dipoles to Basic Quantities［J］. IEEE Transactions on Electromagnetic compatibility . 1998, 40(4): 297－310 .
［5］Kazemipour A,Begaud X.Calculable Dipole Antenna for EMC Measurements with Low-Loss Wide-Band Balun from 30 MHz to 2 GHz［J］. Electromagnetics, 2005,25:187－202.
［6］Chen Z, Cook A. Low uncertainty broadband EMC measurement using calculable precision biconical antennas［C］// IEEE International Symposium on Electronic Compatibility, Anaheim, CA, USA,2000.
［7］ANSI C63.5-2006 (Revision of ANSI C63.52004), American National Standard for Electromagnetic Compatibility–Radiated Emission Measurements in Electromagnetic Interference (EMI) Control–Calibration of Antennas (9 kHz to 40 GHz) ［S］.2006.
［8］Salter M J,Alexander M J.EMC antenna calibration and the design of an open-field site ［J］. Meas Sci Technol, 1991, 2:510－519 .
［9］CISPR/A/858/CD, CISPR 16-1-6: Specification for radio disturbance and immunity measuring apparatus and methods －Part 1-6: Radio disturbance and immunity measuring apparatus-EMC-antenna calibration ［S］.2009.
［10］Smith A A. Standard Site Method for Determining Antenna Factors［J］. IEEE Transactions on EMC, 1982, 24(3):316－322.
［11］Donglin Meng,Xiao Li,Xiaoxun Gao. Near-Field Corrections to Antenna Factor of Dipole Antennas calibrated in very narrow OATS［C］// ICMMT, Chengdu, China, 2010.
2011, Vol. 32 
