Shure UA874 Active Directional Antenna - UA874US

Product Overview

The Shure UA874 active directional antenna improves UHF wireless microphone reception in commercial AV installations where signal integrity and channel count matter. Its log periodic dipole array produces a directional cardioid pattern that focuses on the intended coverage area while rejecting RF interference from outside it. This makes the UA874US a practical choice for conference rooms, broadcast studios, and house of worship systems running Shure UHF wireless. An integrated amplifier with four gain settings helps compensate for cable loss across longer coax runs.

Product Description

Designed as remote-antenna infrastructure for wireless microphone systems, the UA874 active directional antenna extends usable range and reliability in demanding commercial deployments. The log periodic dipole array delivers greater rejection of off-axis RF than a standard half-wave omnidirectional antenna, which reduces dropouts in RF-congested environments such as multi-room corporate facilities and broadcast studios. The built-in amplifier offers four gain settings so AV system designers can match the antenna to the coaxial cable run and minimize signal loss between the antenna and the receiver or distribution system. The UA874 stand-mounts, suspends from a ceiling, or wall-mounts using the included swivel adapter bracket, giving integrators flexible placement options for fixed installations. It operates with Shure receivers and antenna distribution systems that supply 10–15 V DC bias, and pairs naturally with UHF platforms like the ULX-D digital wireless system. For low-loss connection, Shure specifies 50 ohm coaxial cable such as RG-8U.

Key Features

• Log Periodic Dipole Array — A directional element design produces a cardioid pattern aimed at the coverage area for stronger on-axis reception than an omnidirectional antenna.
• Off-Axis RF Rejection — The directional pattern rejects RF signals originating outside the coverage area, reducing interference and dropouts in congested wireless environments.
• Integrated Amplifier with Four Gain Settings — Selectable gain compensates for varying degrees of coaxial cable signal loss across short and long antenna runs.
• VHF and UHF Support — The UA874 series supports VHF and UHF wireless systems, making it suitable for a wide range of Shure wireless platforms.
• Flexible Mounting — The antenna can be stand-mounted, ceiling-suspended, or wall-mounted using the included swivel adapter bracket for fixed commercial installations.
• DC Bias Powered — The active amplifier draws 10–15 V DC bias directly from compatible Shure receivers or antenna distribution systems, eliminating a separate power supply.

Typical Applications

• Conference room
• Boardroom
• Broadcast studio
• House of worship
• Auditorium
• Multi-purpose room

Technical Specifications

Frequently Asked Questions

Which Shure systems is the UA874 compatible with?
The UA874 works with Shure wireless receivers and antenna distribution systems that provide 10–15 V DC bias, including UHF platforms such as the ULX-D series. Confirm the frequency band of your system matches your regional spectrum plan.

Does the antenna require a separate power supply?
No. The integrated amplifier is powered by 10–15 V DC bias delivered over the coaxial connection from a compatible receiver or antenna distribution system, so no external power supply is needed.

How should it be installed for best performance?
Mount the UA874 with a clear line of sight to the transmitters, aim the directional front of the antenna toward the coverage area, and use 50 ohm low-loss coax such as RG-8U. Set the amplifier gain to compensate for the loss of your specific cable run.

Can it be paired with an antenna distribution system?
Yes. In multi-channel commercial deployments the UA874 is commonly combined with a Shure antenna distribution system to feed several receivers from a single antenna pair, simplifying rack-mount RF infrastructure.

What is the warranty?
This product is covered by the Shure manufacturer warranty. Contact Creation Networks for current warranty terms and commercial AV support.

Related infrastructure: Shure MXCWAPT-A Access Point Receiver.