A receiving apparatus is for receiving radio signals including image information transmitted by a mobile transmitting device through a plurality of receiving antennas. The receiving apparatus includes a plurality of frequency converters for outputting modulated signals obtained by converting respective radio signal received through the plurality of receiving antennas by different modulation frequencies; a superposing unit for superposing each of the modulated signals generated by the plurality of frequency converters on a frequency axis; a cable with a single coaxial cable where each of the modulated signals superposed by the superposing unit is transmitted; and a receiving unit for demodulating each modulated signal input through the cable to receive and output the image information.