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Key Features

  • Frequency Range 30 MHz to 1 GHz
  • FCC Design
  • Low VSWR and Balun Loss
  • Individually Calibrated
  • Appropriate for Site Attenuation Measurements
  • Both Stinger and EMCO Mounts Included
  • Download PDF Datasheet
  • ETS-Lindgren's Model 3121D Tuned Dipole Antenna's behavior approaches to the theoretically perfect half-wavelength resonant dipole.ETS-Lindgren has made select physical improvements to the original design assuring optimal performance and years of trouble-free use. The 3121D offers an accurate standard for precise EMI measurements including FCC and EN compliance testing, site attenuation as described in EN55022 and ANSI C63.4, and antenna calibration as described in ANSI C63.5.

    The model 3121D covers a frequency range of 30 MHz to 1 GHz and its behavior approaches to the theoretically perfect loss-less half-wavelength resonant dipole.

    Each 3121D Dipole is individually calibrated at 10 meters per ANSI C63.5, using the preferred three antenna method. All measurement equipment used is NIST traceable.

    These measurements are made without the use of attenuators, so antenna factors are a true presentation of actual performance. A printout of the calibration data of each antenna is included with the Manual and is also archived. Individual calibration and actual antenna factors are preferred over typical or theoretical factors and provide confidence of test data.

    Specifications
    View the 3121D Dipole technical specifications below

    Physical Specifications


    Electrical Specifications

    Impedance (Nominal): 50
    VSWR: <1.6:1
    Pattern Type: Omnidirectional
    Polarization: Linear

    Model
    Frequency
    Connectors
    Maximum Continuous Power
    Balun 1
    30 MHz to 60 MHz
    Type N (f)
    260 W
    Balun 2
    60 MHz to 140 MHz
    Type N (f)
    160W
    Balun 3
    140 MHz to 400 MHzT
    Type N (f)
    80 W
    Balun 4
    400 MHz to 1 GHz
    Type N (f)
    50 W


    Product Options

    • 4-TR Tripod
    • 7-TR Tripod

    Product Configuration

    • Two Low-frequency Adjustable Elements
    • Base Drilled to Accept ETS-Lindgren or Other Tripod Mount with Standard 1/4 in x 20 Threads
    • Two Medium Frequency Adjustable Elements
    • One (1) 5 m Tape Measure
    • Support Rod
    • 7.6 m (25 ft) Cable with Type N Connectors
    • One High Frequency Ruler for DB4
    • Four (4) Element Extension Rods
    • Carrying Case
    • Clamp Block
    • Both Stinger and EMCO Mounts Included
    • Actual Individual Calibration Factors and Signed Certificate of Conformance
    • Users Manual

    Charts
    View the 3121D Dipole charts below

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