Mitigating Zenith Blindness from Mutual Coupling in a Sunflower Phased Array

被引：1

作者：

Anstey, Dominic ^{[1
,2
]}

Cumner, John ^{[1
,2
]}

Gueuning, Quentin ^{[1
,2
]}

O'Hara, Oscar ^{[1
,2
]}

Acedo, Eloy de Lera ^{[1
,2
]}

Brown, Anthony ^{[3
]}

Faulkner, Andrew ^{[1
]}

Dulwich, Fred ^{[1
]}

Scott, Paul ^{[1
]}

机构：

[1] Univ Cambridge, Cambridge, England

[2] Univ Cambridge, Kavli Inst Cosmol Cambridge, Cambridge, England

[3] Queen Mary Univ London, London, England

来源：

2024 18TH EUROPEAN CONFERENCE ON ANTENNAS AND PROPAGATION, EUCAP | 2024年

基金：

英国科学技术设施理事会;

关键词：

antennas; electromagnetics; propagation; measurements;

D O I：

10.23919/EuCAP60739.2024.10501737

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The most recent Aperture Array Verification System for the SKA-Low, AAVS3, has been designed with a regular sunflower head 'Vogel' layout with a 19 m radius. We use a fast Method-of-Moments solver to investigate the effects of mutual coupling of this style of regular layout in comparison to a more randomised layout. We show that this layout produces a blind spot at zenith at 125 MHz, where the embedded element pattern and station beam show a drop of around 5 dB. We then demonstrate that randomising the locations of the elements reduces the scale of this drop in beam, with greater randomisation producing greater reduction. We find that randomising each element position within an area of around 1.5 m radius is sufficient to eliminate this blind spot.

引用

页数：5

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