A Zero Placement Algorithm for Synthesis of Flat Top Beam Pattern With Low Sidelobe Level

Dai, Shaowei; Li, Minghui; Abbasi, Qammer H.

doi:10.1109/access.2020.3045287

Cited by 16 publications

(10 citation statements)

References 31 publications

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“… Normalised array factors of compensated Dolph‐Chebyshev [8] and quadratic‐transformed Gaussian arrays with 16 elements, obtained for sidelobe level of −20 dB. …”

Section: Design Of Flat‐top Arraysmentioning

confidence: 99%

“…However, as a consequence of integer orders of flatness, this method provides a limited number of beam widths. This drawback can be overcome by compensation of pencil beams [8] or by using pencil to flat‐top beam transform [9]. The former approach flattens the pencil beam by a second‐order broadening polynomial, whereas the latter introduces flatness by applying quadratic function to an arbitrary symmetrical excitation.…”

Section: Introductionmentioning

confidence: 99%

“…Flat-top beams are a type of shaped array patterns which approximate rectangular function in a certain region. For their synthesis, many analytical [1][2][3][4][5][6][7][8][9], optimisation-based [10][11][12][13][14][15][16][17][18], and hybrid [19][20][21] methods have been developed. However, in the design of arrays requiring fast and robust beamforming, the methods with low computational complexity are preferred.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis of flat‐top beampatterns based on simple polynomial transforms of Gaussian excitations

Molnar,

Ljubenko,

Šakić

2023

IET Microwaves Antenna & Prop

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In the design of antenna arrays which require fast and robust flat‐top beam synthesis, computationally efficient methods are preferred. This feature is usually met by analytical techniques or simple optimisation procedures. On the other hand, in the flat‐top beam synthesis, a common requirement is the ability to control beamwidth or sidelobe level. However, this can result in a high dynamic range ratio (DRR) of array's excitation coefficients. In this paper, a straightforward method for the design of symmetrical flat‐top arrays with controllable sidelobe level or DRR is proposed. The method is based on quadratic and cubic transforms of Gaussian excitations. In addition, the method utilises zero coefficients whose positions are used to control the DRR, including the ability to achieve its minimum. Compared to other flat‐top arrays with analytically shaped beams, the proposed arrays have lower DRRs for the same sidelobe level.

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“… Normalised array factors of compensated Dolph‐Chebyshev [8] and quadratic‐transformed Gaussian arrays with 16 elements, obtained for sidelobe level of −20 dB. …”

Section: Design Of Flat‐top Arraysmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of flat‐top beampatterns based on simple polynomial transforms of Gaussian excitations

Molnar,

Ljubenko,

Šakić

2023

IET Microwaves Antenna & Prop

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show abstract

“…As it can be proved, when k=0, the specified progressive excitation phase φ ensures C 0 ([θ L , θ H ])=[θ L , θ H ] as indicated in (30), in which the set…”

Section: Spacing Constraintmentioning

confidence: 99%

“…Aiming at 5G Internet of Things applications, an iteration algorithm is generated based on the compressive sensing approach for the FTB synthesis of a sparse array [29]. With a zero placement, a timecost effective algorithm is proposed for the FTB synthesis, achieving low SLLs with ripples of 0.25 dB in the main lobe [30]. The sector beam array design is introduced as an example of the Fourier series method with windowing, demonstrating that the broadside and oblique FTB synthesis can be performed using a low-pass FIR filter with a frequency shifting [31].…”

Section: Introductionmentioning

confidence: 99%

A Generalized Flat-Topped Beam Synthesis Approach for Uniform Linear Array With Arbitrary Beam Directions

Zhang

Jiang

et al. 2022

IEEE Open J. Antennas Propag.

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A systematic approach to synthesize the flat-topped beam (FTB) with arbitrary beam directions for uniform linear arrays (ULAs) is proposed, illustrated, and demonstrated. Based on the correspondence between the far-field pattern of ULAs and the response function of finite impulse response (FIR) filters, both the broadside and end-fire FTBs can be synthesized using window method, whereas the oblique FTB synthesis is failed due to the appearance of grating lobes. A mathematical analyzation indicates that two grating lobes are conjugate to each other. Thus, a linear phase method (LPM) is proposed to apply progressive excitation phases to each individual array element, which can eliminate the grating lobes by manipulating the two conjugate beams to overlap with each other. The proposed LPM is generalized to the synthesis of broadside, oblique and unidirectional end-fire FTBs, and the corresponding inter-element spacing constraints are addressed. The proposed approach is experimentally verified using a 16-element substrate-integrated waveguide slot antenna array. Comparing with the conventional Fourier series method and Woodward-Lawson method, the proposed approach has advantages of both smaller ripples in the main beam and controllable side-lobe levels. The proposed approach is promising for offering efficient beamforming functionalities for wireless communications, imaging, and radar applications.INDEX TERMS Beamforming, flat-topped beam, spacing constraint, uniform linear array.

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Design of linear array for shaped beams using enhanced flower pollination optimization algorithm

Vegesna

Yamuna²,

Terlapu³

2022

Soft Comput

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A Zero Placement Algorithm for Synthesis of Flat Top Beam Pattern With Low Sidelobe Level

Cited by 16 publications

References 31 publications

Synthesis of flat‐top beampatterns based on simple polynomial transforms of Gaussian excitations

Synthesis of flat‐top beampatterns based on simple polynomial transforms of Gaussian excitations

A Generalized Flat-Topped Beam Synthesis Approach for Uniform Linear Array With Arbitrary Beam Directions

Design of linear array for shaped beams using enhanced flower pollination optimization algorithm

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