UA870WB アクティブ指向性アンテナ

U4S, U4D, ULXP, ULXS, UR4S, UR4Dレシーバー或いはUA844, UA845アンテナディストリビューションシステム用UHFアクティブディレクショナルアンテナ

The Shure UA870WB is an active UHF wireless directional antenna. It features a log periodic dipole array. When compared to an omnidirectional 1/2-wave antenna, the cardioid pattern provided by the UA870 offers enhanced reception of the desired coverage area and greater rejection of RF signals outside the coverage area.

To compensate for coaxial cable signal loss, the UA870 has an on-board amplifier that offers user selectable 3 or 10 dB gain. The gain setting is indicated by two LEDs. Remote 12 Vdc power for the antenna amplifi er is provided by a Shure UR4 or ULX Receiver or a Shure UA845 or UA844 Antenna Distribution System through the connecting coaxial cable.

The UA870WB can be mounted on a microphone stand, suspended from the ceiling, or mounted to a wall using the integrated swivel adapter bracket. The UA870 is weather resistant for use outdoors. For best diversity performance, use two UA870 antennas.

RF Frequency Range

  • UA870A: 782-810 MHz
  • UA870KK: 838-862 MHz
  • UA870MB: 800-830 MHz
  • UA870MC: 774-782 MHz
  • UA870UB: 692-716 MHz
  • UA870WB: 470-900 MHz
  • UA870USTV: 470-698 MHz
  • UA870X: 944-952 MHz


  • Power Source: Remote 12 Vdc from coaxial cable connection to receiver or antenna distribution system.
  • Power Consumption
    • UA870 (A, KK, MB, MC, UB, X): 0.81 W (12 Vdc)
    • UA870 (WB, USTV): 68W (12Vdc)
  • Antenna Gain: 7 dB typical (on axis)
  • Amplifier Gain:
    • UA870 (A, KK, MB, MC, UB, X):
      • Gain Switch at 3 dB: 3 dB ± 2 dB
      • Gain Switch at 10 dB: 10 dB ± 2 dB
    • UA870 (WB, USTV)
      • Gain Switch at 3 dB: –2, +1.5 dB
      • Gain Switch at 10 dB: –1 dB, +3.0 dB
  • Third Order Intercept Point (3OIP) at output: More than 30 dBm
  • Reception Pattern
    • Directional; Cardioid
    • 3dB Beam Width: 100 degrees
  • Amplifier Gain Indicators:
    • 3 dB: Green LED
    • 10 dB: Red LED
  • Connector: Female, BNC-type
  • Dimensions:
    • UA870 (A, KK, MB, MC, UC, X): 226 mm x 234 mm x 40.7 mm
    • UA870 (WB, USTV): 316.2 mm x 359.4 mm x 35.5 mm
  • Stand Adapter: Positive-action, break resistant, adjustable from 0 to 90 degrees, with standard 5/8 in. -27 thread
  • Net weight:
    • UA870 (A, KK, MB, MC, UC, X): 227 g
    • UA870 (WB, USTV): 317 g


ua870-user_guide PDF