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Open AccessArticle

3D Multi-Beam and Null Synthesis by Phase-Only Control for 5G Antenna Arrays

Department of Engineering and Architecture, University of Trieste, Via A. Valerio 10, 34127 Trieste, Italy
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Electronics 2019, 8(6), 656; https://doi.org/10.3390/electronics8060656
Received: 5 May 2019 / Revised: 30 May 2019 / Accepted: 8 June 2019 / Published: 11 June 2019
(This article belongs to the Special Issue Recent Advances in Array Antenna and Array Signal Processing)
This paper presents an iterative algorithm for the synthesis of the three-dimensional (3D) radiation pattern generated by an antenna array of arbitrary geometry. The algorithm is conceived to operate in fifth-generation (5G) millimeter-wave scenarios, thus enabling the support of multi-user mobile streaming and massive peer-to-peer communications, which require the possibility to synthesize 3D patterns with wide null regions and multiple main beams. Moreover, the proposed solution adopts a phase-only control approach to reduce the complexity of the feeding network and is characterized by a low computational cost, thanks to the closed-form expressions derived to estimate the phase of each element at the generic iteration. These expressions are obtained from the minimization of a weighted cost function that includes all the necessary constraints. To finally check its versatility in a 5G environment, the developed method is validated by numerical examples involving planar and conformal arrays, considering desired patterns with different numbers of main beams and nulls. View Full-Text
Keywords: 3D synthesis; conformal antenna arrays; phase-only control; multi-beam pattern; null constraints 3D synthesis; conformal antenna arrays; phase-only control; multi-beam pattern; null constraints
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Comisso, M.; Palese, G.; Babich, F.; Vatta, F.; Buttazzoni, G. 3D Multi-Beam and Null Synthesis by Phase-Only Control for 5G Antenna Arrays. Electronics 2019, 8, 656.

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