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The mainstream of the wave signal used as a standard of time and frequency in recent years is shifting from HF analog modulation to LF digital modulation. The radio control clock which automatically adjust the time by using standard-frequency and time-signal is getting popular on the market. The ferrite-loaded small loop antenna has been mainly used as a built-in antenna for reception of LF and MF waves including standard-frequency and time-signal because the size is very small compared with wavelength. In this study the numerical analysis of the antenna characteristic using the electromagnetic field simulator is considered solenoid coil placed over the uniform AC magnetic field as the size of antenna is much smaller than wavelength.ferrite-loaded small loop antenna
