MILLIMETER WAVE BAND TRANSMISSION SYSTEM

PROBLEM TO BE SOLVED: To effectively use frequencies to transmit a satellite signal from two geostationary satellites between buildings in a building shadow. SOLUTION: A first transmitter 20 applies frequency conversion to first and second satellite intermediate frequency signals to obtain first and second millimeter wave band signals with almost same frequency band of different polarized waves. Then, the first transmitter transmits the first and the second millimeter wave band signals to a building in a building shadow. A first receiver 30 located at the building in the building shadow receives the first and the second millimeter wave band signals, and applies frequency conversion to obtain the first and the second original satellite intermediate frequency signals. A second transmitter 42 located at the building in the building shadow carries out re-conversion into the first and second millimeter wave band signals to transmit them from the roof. Each of a plurality of second receivers located respectively at a different position on the building in the building shadow receives the first and the second millimeter wave band signals, and applies frequency conversion to obtain the first and the second original satellite intermediate frequency signals. A third transmitter 62 located at the building in the building shadow carries out frequency conversion for the first and the second satellite intermediate frequency signals from the first receiver 30 to obtain the first and the second millimeter wave band signals and transmit them to a building in another building shadow. COPYRIGHT: (C)2011,JPO&INPIT