The 7/16 DIN connectors are designed for communications antennas, base stations, satellite communications, and other high power communications applications.  The high power 50Ω connector can work with equipment as much as 100 watts of power per channel.  It offers a low VSWR (Voltage Standing Wave Ratio) for excellent audio performance and is designed to prevent dust or other debris from interfering with the contacts. One of the first connectors capable of carrying microwave-frequency signals in military applications is the N Type (Neill) connector.  Originally designed to carry signals of up to 1 GHz in military applications, precision enhancements to the design have scaled this up to 18 GHz.  The 50Ω versions are widely used in the infrastructure of land mobile, wireless data, paging, and cellular systems while the 75Ω versions are primarily used in the infrastructure of cable television systems.  The N Type connector is favored by enthusiasts who create their own Wireless LAN antenna systems, which run at 2.4 GHz or 5 GHz, and also as a standard connection for homebrew antennas.  Additionally, these connectors are commonly used on amateur radio devices, like transceivers, operating in UHF bands.