Abstract: With the development of modem science technology and the emergent requirement of market, modem radar trends to the direction of muhi-function,flexility ,unification in one radar. The users hope to use only one receiver for various functions,all standards applications, it demands muhiband reconfigurable receiver. This paper discusses various architectures of multiband reconfigurable receiver for radars, and presents a novel muhiband reconfigurable receiver architecture suitable for a fully integration. its architecture is very simole, and can attain very good oerformance.