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Key Features

  • 100 MHz to 1.1 GHz Frequency Range
  • 1.5:1 VSWR
  • Average 800 W Maximum Continuous Input
  • Stainless Steel Construction Dual
  • Linearly Polarized
  • Download PDF Datasheet
  • ETS-Lindgren's Model 3145BDP Dual-Polarized Log-Periodic Dipole Array (LPDA) is a dual linearly polarized, broadband log antenna designed to operate over the frequency range of 100 MHz to 1.1 GHz. The choice of scaling factors, the various diameters of each element, and the center-to-center spacing of the booms result in excellent VSWR characteristics throughout the operating frequency range.

    The precise design of the feed and positioning of the elements on the boom yields optimum phase relationship. This causes the active region, at any given frequency, to propagate RF energy towards the smaller elements, leaving the elements behind it inactive and operating as reflectors to improve the gain. The constant gain of the antenna yields an antenna factor which varies linearly with frequency. The variation is smooth; therefore, accurate interpolation of performance between specified frequency points is simple.

    Specifications
    View the 3145BDP Dual-Polarized Log-Periodic Dipole Array technical specifications below

    Physical Specifications

    Height: 1.33 m (4.36 ft)
    Width: 1.62 m (5.31 ft)

    Electrical Specifications

    Frequency Maximum: 1.1 GHz
    Frequency Minimum: 100 MHz
    Input Impedance: 50
    VSWR: 1.5:1 Average; 3.5:1 Maximum
    Maximum RF Input Power: 800 W
    Pattern Type: Directional
    Polarization: Linear

    Product Configuration

    • Antenna Including Mounting Flange
    • Individually Calibrated at 10 m per ANSI C63.5-1988
    • Actual antenna factors gain uncertainty values and a signed Certificate of Calibration Conformance included in manual.
    • Manual

    Charts
    View the 3145BDP Dual-Polarized Log-Periodic Dipole Array charts below