{
    "identifier": "ark:\/88434\/mds2-4020",
    "accessLevel": "public",
    "contactPoint": {
        "hasEmail": "mailto:[email protected]",
        "fn": "Josh Gordon"
    },
    "programCode": [
        "006:045"
    ],
    "landingPage": "https:\/\/data.nist.gov\/od\/id\/mds2-4020",
    "title": "Data for paper \"Improved Broadband Antenna Gain Measurements Through Multipath Mitigation Using Combined Robot Motion Stirring\"",
    "description": "This data set is for the figures in the paper titled, \"Improved Broadband Antenna Gain Measurements Through Multipath Mitigation Using Combined Robot Motion Stirring\". In this paper we describe a technique that uses coordinated motion of two robotic antenna positioners to mitigate the influence of chamber multipath reflections during antenna gain measurements. This technique demonstrates a new application that leverages the capability of modern robotic antenna ranges to accurately position pairs of antennas relative to an anechoic chamber over a wide range of poses. In this technique, through\ncalibrated kinematic control of the robotic positioners, antenna pair poses are dynamically changed relative to the bounds of the chamber while maintaining the measurement geometry in the reference\nframe of the antenna pairs. This creates a scenario where the chamber is effectively moving relative to the reference frame\nof the gain measurement geometry, thus resulting in \u201cstirring\u201d of the multipath chamber reflections. Through this stirring process, the effect of multipath reflections can be effectively averaged\nout, allowing antenna gain to be recovered even in the presence of appreciable multipath chamber reflections. This technique is demonstrated with the three-antenna gain extrapolation method to improve gain calibrations that involve broad band dual ridge horn antennas. Gain measurement results in the WR430 and WR650 bands that incorporate NIST standard gain horn\nreference antennas and lower gain dual ridge broadband horn antennas are presented. We show that antenna gain can be accurately recovered with uncertainties of \u2248 \u00b1 0.07 dB, even\nwhen measurements are significantly perturbed by several dB due to chamber multipath reflections caused by the lower gain dual ridge horn antennas.\n",
    "language": [
        "en"
    ],
    "distribution": [
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-4020\/4020_README.txt",
            "mediaType": "text\/plain",
            "title": "4020_README"
        },
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-4020\/fig6.csv",
            "mediaType": "text\/csv",
            "title": "fig6"
        },
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-4020\/fig7Data.csv",
            "mediaType": "text\/csv",
            "title": "fig7Data"
        },
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-4020\/fig10Data.csv",
            "mediaType": "text\/csv",
            "title": "fig10Data"
        },
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-4020\/fig8Data.csv",
            "mediaType": "text\/csv",
            "title": "fig8Data"
        },
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-4020\/fig9Data.csv",
            "mediaType": "text\/csv",
            "title": "fig9Data"
        },
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-4020\/fig5b.csv",
            "mediaType": "text\/csv",
            "title": "fig5b"
        },
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-4020\/fig5a.csv",
            "mediaType": "text\/csv",
            "title": "fig5a"
        },
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-4020\/fig11Data.csv",
            "mediaType": "text\/csv",
            "title": "fig11Data"
        }
    ],
    "bureauCode": [
        "006:55"
    ],
    "modified": "2025-11-17 00:00:00",
    "publisher": {
        "@type": "org:Organization",
        "name": "National Institute of Standards and Technology"
    },
    "theme": [
        "Advanced Communications:Wireless (RF)",
        "Standards:Calibration Services",
        "Metrology:Electrical\/electromagnetic metrology",
        "Electronics:Electromagnetics"
    ],
    "keyword": [
        "Antenna",
        "antenna gain",
        "dual ridge antenna",
        "dual ridge waveguide antenna",
        "gain",
        "gain extrapolation",
        "multipath",
        "reflections",
        "robotic antenna measurements."
    ]
}