Shure UA874WB — Active Wideband Directional Antenna (470–952 MHz)

The Shure UA874WB is an active wideband directional log-periodic (LPDA) antenna for Shure wireless microphone systems — the antenna engineers reach for when wireless reception needs to be extended, when interference is an issue, or when a system needs to cover a large venue reliably. The "WB" (wideband) version covers 470–952 MHz, supporting virtually every Shure wireless system across all worldwide frequency bands in a single antenna.

Why an active directional antenna: Standard 1/4-wave "rubber ducky" antennas mounted directly on the receiver have limited range and poor rejection of off-axis interference. An active directional antenna focuses reception in one direction (toward the stage), reducing pickup of off-stage RF noise, and includes a built-in low-noise amplifier (gain switchable: 0/6/12 dB) to compensate for cable loss when the antenna is mounted away from the receiver.

Specifications:

• Frequency range: 470 – 952 MHz (covers UHF Band IV, V, and the new 902-952 MHz range)
• Pattern: Directional (LPDA log-periodic)
• Gain: Switchable 0/6/12 dB amplification
• BNC connector for coax to receiver
• Mounts on standard 5/8" mic stand thread or wall/ceiling bracket
• Powered via 12V DC from the receiver's antenna port (no separate power supply needed)
• Compatible with Shure GLX-D+, ULX-D, QLX-D, BLX, SLX-D, Axient Digital, and PSM in-ear monitor systems

Ideal for: Larger venues with multiple wireless channels, fixed installations needing reliable long-range reception, distance between performer area and receiver rack, RF-challenging environments (LED walls, dimmers, Wi-Fi interference), and AV integrators specifying robust wireless infrastructure.