MICROWAVE BAND RADIO TRANSMISSION DEVICE, MICROWAVE BAND RADIO RECEPTION DEVICE, AND MICROWAVE BAND RADIO COMMUNICATION SYSTEM

摘要

An input modulation signal wave (108a) is frequency up-converted to an intermediate frequency signal wave by a frequency mixer (3). A signal combiner (5a) adds a reference signal wave to the intermediate frequency signal wave which has been subjected frequency up-conversion by the frequency mixer (3), thereby generating an intermediate frequency multiplex signal wave (7). The intermediate frequency multiplex signal wave (7) is frequency up-converted to a millimeter wave by a second frequency mixer (8). The multiplex signal wave of the millimeter wave band which has been frequency up-converted by the second frequency mixer (8) is amplified by a transmission amplifier (10) and transmitted to a transmission antenna (15) as a radio multiplex signal wave (115) consisting of a radio reference signal wave (106) and a radio signal wave (107). Thus, it is possible to provide a microwave band radio transmission device, a microwave band radio reception device, and a microwave band radio communication system having an excellent control of an output signal level and capable of increasing the radio transmission band and the radio transmission distance.