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R. Taylor, K. Manke, D.. (D. Keele, "Constant Directivity Circular-Arc Arrays of Dipole Elements," Paper 9837, (2017 October.). doi: R. Taylor, K. Manke, D.. (D. Keele, "Constant Directivity Circular-Arc Arrays of Dipole Elements," Paper 9837, (2017 October.). doi:
Abstract: We develop the theory for a broadband constant-beamwidth transducer (CBT) formed by a conformal circular-arc line array of dipole elements. Just as for CBT arrays of point sources, with suitable amplitude shading of the source distribution the far-field radiation pattern is constant above a cutoff frequency. This cutoff frequency is determined by the prescribed beam width and arc radius. We illustrate the theory with examples, including numerical simulations of magnitude responses, full-sphere radiation patterns, and directivity index. Unlike a circular-arc array of monopole elements, a dipole CBT maintains directivity control at low frequency. We give an example of one such array that achieves just 1 dB variation in directivity index over all frequencies.

@article{taylor2017constant,
author={taylor, richard and manke, kurtis and keele, jr., d. b. (don)},
journal={journal of the audio engineering society},
title={constant directivity circular-arc arrays of dipole elements},
year={2017},
volume={},
number={},
pages={},
doi={},
month={october},} @article{taylor2017constant,
author={taylor, richard and manke, kurtis and keele, jr., d. b. (don)},
journal={journal of the audio engineering society},
title={constant directivity circular-arc arrays of dipole elements},
year={2017},
volume={},
number={},
pages={},
doi={},
month={october},
abstract={we develop the theory for a broadband constant-beamwidth transducer (cbt) formed by a conformal circular-arc line array of dipole elements. just as for cbt arrays of point sources, with suitable amplitude shading of the source distribution the far-field radiation pattern is constant above a cutoff frequency. this cutoff frequency is determined by the prescribed beam width and arc radius. we illustrate the theory with examples, including numerical simulations of magnitude responses, full-sphere radiation patterns, and directivity index. unlike a circular-arc array of monopole elements, a dipole cbt maintains directivity control at low frequency. we give an example of one such array that achieves just 1 db variation in directivity index over all frequencies.},}

TY - paper
TI - Constant Directivity Circular-Arc Arrays of Dipole Elements
SP - EP -
AU - Taylor, Richard
AU - Manke, Kurtis
AU - Keele, Jr., D. B. (Don)
PY - 2017
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - October 2017 TY - paper
TI - Constant Directivity Circular-Arc Arrays of Dipole Elements
SP - EP -
AU - Taylor, Richard
AU - Manke, Kurtis
AU - Keele, Jr., D. B. (Don)
PY - 2017
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - October 2017
AB - We develop the theory for a broadband constant-beamwidth transducer (CBT) formed by a conformal circular-arc line array of dipole elements. Just as for CBT arrays of point sources, with suitable amplitude shading of the source distribution the far-field radiation pattern is constant above a cutoff frequency. This cutoff frequency is determined by the prescribed beam width and arc radius. We illustrate the theory with examples, including numerical simulations of magnitude responses, full-sphere radiation patterns, and directivity index. Unlike a circular-arc array of monopole elements, a dipole CBT maintains directivity control at low frequency. We give an example of one such array that achieves just 1 dB variation in directivity index over all frequencies.