### Abstract

Achieving frequency invariance in antenna array requires linear-phase system to maintain frequency independent time lag. For example True Time Delay or tapped delay line. In this paper, the array elements are divided into subarrays. Then all subarrays are steered towards the desired azimuth direction, while the wideband property is preserved by exploiting the subarray two-dimensional structure as a sensor delay line. Each subarray pattern is then individually rotated around the desired elevation direction. Eventually superposition of subarrays is maximally constructive towards the desired direction and partially constructive or destructive everywhere else. Two frequency invariant beamformers are used. These are inverse DFT and Least squares. Results are compared with wideband wideband one-dimensional pattern syntheses of the same design methods in power concentration.

Original language | English |
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Title of host publication | 10th IMA International Conference on Mathematics in Signal Processing |

Number of pages | 4 |

Publication status | Published - 15 Dec 2014 |

Event | 10th IMA International Conference on Mathematics in Signal Processing - IET Austin Court, Birmingham, United Kingdom Duration: 15 Dec 2014 → 17 Sep 2016 http://www.ima.org.uk/ |

### Conference

Conference | 10th IMA International Conference on Mathematics in Signal Processing |
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Abbreviated title | IMA 2014 |

Country | United Kingdom |

City | Birmingham |

Period | 15/12/14 → 17/09/16 |

Internet address |

### Keywords

- sensor delay line
- wideband beamforming
- subarray
- frequency independent time lag
- azimuth direction
- wideband

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## Cite this

Alshammary, A., Weiss, S., Soraghan, J., & Almorqi, S. (2014). Wideband 2-Dimensional scanning planar subarray. In

*10th IMA International Conference on Mathematics in Signal Processing*