Shure Domed Helical Antenna (460-900MHz)

The Shure HA‑8091 is a professional‑grade domed helical antenna designed for reliable radio frequency (RF) performance in wireless audio systems. It is used to improve signal transmission and reception for in‑ear monitors (IEM), wireless microphones, and intercom systems, especially in large live‑sound or production environments. Its helical design distributes RF energy in all directions, reducing the risk of signal drop‑outs that can occur with traditional fixed‑polarization antennas.

Key Features

• Frequency Range: 460 to 900 MHz, supporting a wide range of wireless audio systems.

• Antenna Type: Domed helical antenna with circular polarization to minimize drop‑outs by radiating RF energy in 360° polarization.

• Gain: 9 to 11 dBi on‑axis gain for stronger signal performance.

• Impedance: 50 ohms, compatible with standard RF systems.

• Rear Rejection: 14 dB rear rejection to reduce unwanted signal interference from behind the antenna.