Implementation of a Dipole Constant Directivity Circular-Arc Array

Manke K, Taylor R, Paetkau M, Keele J,DB(. Implementation of a Dipole Constant Directivity Circular-Arc Array. In: AES Convention 143. Audio Engineering Society; 2017. Paper 381. Available from: https://aes.org/publications/elibrary-page/?id=19331

@inproceedings{Manke2017_19331,
  author = {Manke, Kurtis and Taylor, Richard and Paetkau, Mark and Keele, Jr., D. B. (Don)},
  title = {{Implementation of a Dipole Constant Directivity Circular-Arc Array}},
  booktitle = {AES Convention 143},
  note = {Paper 381},
  year = {2017},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=19331}
}

TY  - CPAPER
TI  - Implementation of a Dipole Constant Directivity Circular-Arc Array
AU  - Manke, Kurtis
AU  - Taylor, Richard
AU  - Paetkau, Mark
AU  - Keele, Jr., D. B. (Don)
T2  - AES Convention 143
M1  - Paper 381
PY  - 2017
DA  - 2017/10/06
UR  - https://aes.org/publications/elibrary-page/?id=19331
PB  - Audio Engineering Society
LA  - en
AB  - We briefly present the theory for a broadband constant-beamwidth transducer (CBT) formed by a conformal circular-arc array of dipole elements previously developed in seminal works. This technical report considers a dipole CBT prototype with cosine amplitude shading of the source distribution. We show that this leads to a readily-equalizable response from about 100 Hz to 10 kHz with a far-field radiation pattern that remains constant above the cutoff frequency determined by the beam-width and arc radius of the array, and below the critical frequency determined by discrete element spacing at which spatial aliasing effects occur. Furthermore, we show that the shape of the radiation pattern is the same as the shading function, and remains constant over a broad band of frequencies.
ER  -