WP4U+ is a triplexer manufactured by Mini-Circuits. It is designed for use in wireless applications where three port isolation and signal conditioning are required. The device consists of three thin-film directional couplers connected to three low pass filters to provide isolation, protection, and signal conditioning between transmit, receive, and power ports. It also allows for simultaneous operation of high linearity, low noise amplifiers, receivers, and antennas. The WP4U+ also includes a comprehensive power splitter/combiner and signal conditioning circuitry to condition the signal path in both transmit and receive directions. This device meets demanding requirements for low loss, high isolation, and low spurious response as well as meeting RoHS compliance requirements.