DEVICE FOR COUPLING AND AMPLIFYING TWO BROAD BAND SIGNALS

摘要

PROBLEM TO BE SOLVED: To provide a device for coupling and amplifying two broad band signals which are received from different transmission networks and sent through transmission channels with a frequency apart from each other. SOLUTION: The proposed device includes a broad band amplifier BV, a preamplifier VV and a frequency filter unit FW. The preamplifier VV and the frequency filter unit FW adjust a signal to be amplified and optimize the S/N between two coupled broad band signals. The preamplifier matches the level of one signal with that of the other signal so as to allow the broad band amplifier BV to attain a linear and high amplification factor. In the case of coupling the two signals by using the frequency filter unit to filter the signal, entry of an interference signal as a noise included in one signal to a frequency band for the other signals prevented.