Rotor-blade modulation on antenna amplitude pattern and polarization: Predictions and measurements

Craig R. Birtcher; Constantine Balanis; Dennis DeCarlo

doi:10.1109/15.809828

Rotor-blade modulation on antenna amplitude pattern and polarization: Predictions and measurements

Craig R. Birtcher, Constantine Balanis, Dennis DeCarlo

Electrical Engineering

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

The rotation of lift- and thrust-generating airfoils causes a periodic variation in aircraft communication signals. This effect is called rotor-blade modulation (RBM). The RBM on the radiation characteristics of helicopter-mounted antennas are predicted using the uniform theory of diffraction (UTD) and the finite-difference time-domain (FDTD) method and are compared with scale mode measurements and full-scale in-flight measurements. In addition, the effects of electric field polarization on RBM are studied using the FDTD.

Original language	English (US)
Pages (from-to)	384-393
Number of pages	10
Journal	IEEE Transactions on Electromagnetic Compatibility
Volume	41
Issue number	4 PART 1
DOIs	https://doi.org/10.1109/15.809828
State	Published - 1999

Keywords

Measurements
Predictions
Radiation patterns
Rotor blade modulation

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/15.809828

Cite this

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abstract = "The rotation of lift- and thrust-generating airfoils causes a periodic variation in aircraft communication signals. This effect is called rotor-blade modulation (RBM). The RBM on the radiation characteristics of helicopter-mounted antennas are predicted using the uniform theory of diffraction (UTD) and the finite-difference time-domain (FDTD) method and are compared with scale mode measurements and full-scale in-flight measurements. In addition, the effects of electric field polarization on RBM are studied using the FDTD.",

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AU - Balanis, Constantine

AU - DeCarlo, Dennis

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Y1 - 1999

N2 - The rotation of lift- and thrust-generating airfoils causes a periodic variation in aircraft communication signals. This effect is called rotor-blade modulation (RBM). The RBM on the radiation characteristics of helicopter-mounted antennas are predicted using the uniform theory of diffraction (UTD) and the finite-difference time-domain (FDTD) method and are compared with scale mode measurements and full-scale in-flight measurements. In addition, the effects of electric field polarization on RBM are studied using the FDTD.

AB - The rotation of lift- and thrust-generating airfoils causes a periodic variation in aircraft communication signals. This effect is called rotor-blade modulation (RBM). The RBM on the radiation characteristics of helicopter-mounted antennas are predicted using the uniform theory of diffraction (UTD) and the finite-difference time-domain (FDTD) method and are compared with scale mode measurements and full-scale in-flight measurements. In addition, the effects of electric field polarization on RBM are studied using the FDTD.

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KW - Predictions

KW - Radiation patterns

KW - Rotor blade modulation

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IS - 4 PART 1

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Rotor-blade modulation on antenna amplitude pattern and polarization: Predictions and measurements

Abstract

Keywords

ASJC Scopus subject areas

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