ANTENNA FOR BASE STATION OF MOBILE COMMUNICATION SYSTEM

摘要

PURPOSE: By dividing the received signal into a plurality of amplifiers and amplifying the cell site antenna for the mobile communications systems prevents the breakdown of the receiving level due to the error of the amplifier of the arbitrary a one. CONSTITUTION: A received signal amplifier comprises the first switch(722), the second switch(724), and the band pass filter(726) and low noise amplifier. According to the first switch is the switching control signal, the downstream transmission signal is transmitted with the Radiation element. According to the first switch is the switching control signal, the route of the sending/receiving signal is switched. According to the second switch is the switching control signal, the route of the sending/receiving signal is switched.