Microlab BK-2005E is a Diplexer which allows combination and separation of the signals in 1710-1735/2110-2135 MHz and 1760-1780/2160-2180 MHz commercial wireless bands. To minimize band inter-reaction, the inputs are well isolated and have minimal insertion loss over their respective frequency bands. Attention to mechanical design ensures guaranteed low passive intermodulation. The Diplexer has been designed using passive, proprietary techniques which minimizes cost and size. It allows efficient combining or division of the standard cellular bands for use in coaxial distributed in-building cellular network or DAS.