The SYMAIR tower mount double unit diplexer is designed to combine and separate 1710–1755/2110–2155 MHz and 1850–1990 MHz signals across two parallel RF paths. Its 4-input and 2-output architecture allows PCS, AWS and WCS network equipment to share feeder infrastructure while maintaining low insertion loss and high isolation between operating bands. With DC bypass on all ports, 200 W power handling per port, low-PIM performance and an IP67-rated enclosure, the unit is suitable for tower-mounted base stations and outdoor cellular network deployments.