Shure UA 285 Coaxial Antenna Cable

The Shure UA 285 is a professional coaxial antenna cable designed for use in wireless microphone and in-ear monitor systems to connect remote antennas to their respective receivers or antenna distribution systems. This specific cable type, often an RG-58/U equivalent, is engineered to maintain signal integrity over distance by minimizing RF signal loss and susceptibility to interference. Its construction typically features a central conductor, dielectric insulation, a braided shield, and a durable outer jacket, all optimized for the UHF frequency ranges used by professional wireless audio equipment. The primary function of the UA 285 is to extend the placement of antennas away from the receiver rack, allowing for optimal antenna positioning at the edge of a stage or in a venue's rafters to achieve clear line-of-sight to transmitters and improve overall system reliability and range.

The cable is terminated with standard connectors, most commonly BNC connectors, which provide a secure, locking connection that prevents accidental disconnection—a critical feature in live event environments. The length of such cables is carefully considered, as longer runs inherently introduce greater signal attenuation; therefore, they are used strategically within a system design to balance placement needs with acceptable signal loss. For large-scale installations and touring rigs, these cables are an essential component of a well-designed wireless infrastructure, enabling the centralization of receivers in a controlled equipment rack while deploying antennas in the ideal location for RF reception.

For system engineers and wireless coordinators, using high-quality, properly specified coaxial cable like the Shure UA 285 is fundamental to maximizing wireless system performance. It ensures that the weak RF signal captured by the remote antenna is delivered to the receiver with minimal degradation. This practice is a cornerstone of professional RF management, helping to prevent dropouts, reduce intermodulation issues, and provide a stable, robust wireless audio link that performers and audio technicians can rely on throughout an event.