ASYMMETRICAL ATTENUATOR FOR A RADIO FREQUENCY COMMUNICATION EQUIPMENT, PARTICULARLY REGARDING TO DIVIDING A RADIO FREQUENCY INTO A TRANSMISSION FREQUENCY AND A RECEPTION FREQUENCY AND THEN ATTENUATING THE DIVIDED FREQUENCIES BASED ON A TRANSMISSION BAND OR A RECEPTION BAND

摘要

PURPOSE: An asymmetrical attenuator for a radio frequency communication equipment is provided to improve the linearity in a band at a low cost, protect a repeater and reduce a noise of a base station by obtaining an attenuation amount by coupling at a rear end of a circulator. CONSTITUTION: Transmitting signals flow in only one direction by using a circulator(1). Receiving signals are coupled by a coupler(2) as much as required signals, and the coupled signals flow through another port of the circulator(1).