method of Standard Site Method (SSM) in the American National Standards\nInstitute�s ANSI C63.5 is de-scribed in the frequency ranges from 30\nMHz to 1000 MHz. And a measurement system is set up for determining antenna\nfactors (AF) of antennas on an Open Area Test Sites (OATS). AF of antennas\nincluding log-periodic antenna and biconical antenna is measured with\nSSM method by Shanghai Institute of Measurement and Testing Technology\n(SIMT), which shows good agreement to data measured by National Institute\nof Metrology (NIM). In the end, it analyzes the measurement uncertainty of\nSIMT in the 30 MHz to 1000 MHz frequency band and does comparison to\nthat of NIM.
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