The SYMAIR mobile twin diplexer combines and separates 1710–2170 MHz and 2300–2700 MHz signals across two parallel RF paths. Its double-unit, 4-input and 2-output configuration allows 2100 MHz and 2600 MHz cellular systems to share feeder infrastructure while maintaining low insertion loss and high isolation between bands. With DC bypass on the low-band ports, 200 W power handling per port, low-PIM performance and an IP67-rated enclosure, it is designed for outdoor mobile network, base station and tower-mounted applications.