Shure UA874V Active Directional Antenna for VHF (174 to 216 MHz)

The Shure UA874V is an active directional antenna created for engineers and performers who depend on VHF wireless systems and want a stronger, cleaner signal. It works within the 174 to 216 MHz band, so it pairs naturally with Shure VHF receivers or antenna distribution hardware that operate in the same range.

Inside the antenna, a log-periodic dipole array focuses reception in a 120-degree pattern. That focused pickup helps reject off-axis noise and interference that can creep into omnidirectional antennas. A built-in low-noise amplifier offsets the signal loss that often occurs when long coaxial cable runs are necessary. You can set the gain to +12, +6, 0, or -6 dB, which makes it easy to match the antenna to different cable lengths and venue layouts without over-driving the front end of your receiver.

Installation stays flexible. The UA874V mounts on a standard microphone stand when you need quick, portable placement on stage, and optional brackets let you attach it to a wall or ceiling for permanent installs. Power arrives through the same coaxial line that carries the RF signal, using the 10–15 VDC bias supplied by compatible Shure gear, so there is no need to run a separate power cable.

Because the antenna measures 22 × 17 × 2.7 inches and weighs only 27 ounces, a single person can position it without strain. Once in place, it holds up to a wide temperature range, making it a dependable choice for touring rigs, houses of worship, corporate boardrooms, and broadcast environments where signal consistency is mission-critical.

If you are troubleshooting dropouts in a theater, extending cable runs in a lecture hall, or future-proofing an installed system for multi-room coverage, the UA874V offers a direct way to improve reception without adding complex outboard gear.

• VHF coverage from 174 MHz to 216 MHz for use with Shure VHF wireless systems
• Log-periodic design with a 120-degree beamwidth that focuses reception and reduces interference
• Selectable gain settings of +12, +6, 0, or -6 dB to match different cable lengths and venue needs
• Powered through the coaxial line by a 10–15 VDC bias from compatible Shure receivers or antenna distribution systems
• Mounts easily on microphone stands, walls, or ceilings for portable or permanent setups
• Dimensions of 22 × 17 × 2.7 inches; weight of 27 ounces for straightforward handling