Method of the side-lobe suppression without the main-lobe widening for linear array beam-forming

A Synthesis Algorithm of Beam-Forming for Antenna Pattern

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.472.450 ◽

2014 ◽

Vol 472 ◽

pp. 450-455

Author(s):

Mao Wen Wang ◽

Bao Ping Guo

Keyword(s):

Side Lobe ◽

Antenna Pattern ◽

Beam Forming ◽

Engineering Practice ◽

Synthesis Algorithm ◽

Evaluation Algorithm ◽

Power Pattern ◽

Side Lobe Suppression

In this paper, a beam forming theory for antenna pattern is stated. The formula suitable for engineering practice is deduced through deforming activation value in formula of power pattern. The formula of beam forming and evaluation algorithm are induced, and the algorithm is simulated by using software MATLAB. For a given pattern, the corresponding activation value of each element can be figured out. The simulations reveal that the proposed algorithm can effectively meet the requirements of upper side lobe suppression and lower null-fill. The proposed method is suitable for the design of beam-forming for antenna pattern.

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BAT Algorithm Based Beamformer for Interference Suppression by Controlling the Complex Weight

REV Journal on Electronics and Communications ◽

10.21553/rev-jec.159 ◽

2018 ◽

Author(s):

Luyen Van Tong ◽

Vu Bang Giang Truong

Keyword(s):

Particle Swarm Optimization ◽

Linear Array ◽

Bat Algorithm ◽

Side Lobe ◽

Pattern Synthesis ◽

Swarm Optimization ◽

Proposal A ◽

Null Steering ◽

Accelerated Particle Swarm Optimization ◽

Side Lobe Suppression

In this study, an adaptive beamformer for pattern nulling of Uniformly Spaced Linear Array (ULA) antennas, which utilized BAT algorithm (BA) to suppress interferences, has been proposed. This pattern nulling has been obtained by controlling the complex weight (both the phase and the amplitude) of each array element. So as to verify the proposal, a number of scenarios of ULA pattern imposed the pre-set nulls have been carried out and compared with those of accelerated particle swarm optimization (APSO). The proposed beamformer has demonstrated the capability to place with precise single, multiple, and broad nulls at arbitrary interference directions, suppress side lobes, and maintain a predefined beamwidth. Moreover, the beamformer shows faster convergence and higher efficiency regarding null steering and side lobe suppression in pattern synthesis, as compared with an APSO based beamformer.

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An Efficient Destructive Interference Based on Side Lobe Suppression Method in SONAR Beamforming

Advances in Military Technology ◽

10.3849/aimt.01429 ◽

2021 ◽

Vol 16 (1) ◽

pp. 107-120

Author(s):

S. Pillai ◽

T. Santhanakrishnan ◽

R. Rajesh

Keyword(s):

Side Lobe ◽

Beam Pattern ◽

Primary Beam ◽

Main Lobe ◽

Destructive Interference ◽

Rectangular Window ◽

Window Functions ◽

Suppression Method ◽

Beamforming Technique ◽

Side Lobe Suppression

A novel beamforming technique that resembles the principle of interference is proposed for sonar arrays to suppress the side lobes while the main lobe is kept intact. It uses two window functions. The first one is a rectangular function that produces a primary beam pattern. A secondary new window function is derived and its beam pattern is steered such that the null or trough of the main lobe of the new window coincides with the peak or crest of the first side lobe of the rectangular window and so on to other major side lobes. Pattern multiplication was used to get a final beam pattern. The approach is simulated and verified through a sonar array with 24 hydrophone sensors.

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Optimal Pattern Synthesis of Linear Array and Broadband Design of Whip Antenna Using Grasshopper Optimization Algorithm

International Journal of Antennas and Propagation ◽

10.1155/2020/5904018 ◽

2020 ◽

Vol 2020 ◽

pp. 1-14 ◽

Cited By ~ 1

Author(s):

Hengfeng Wang ◽

Chao Liu ◽

Huaning Wu ◽

Bin Li ◽

Xu Xie

Keyword(s):

Optimization Algorithm ◽

Communication Systems ◽

Linear Array ◽

Side Lobe ◽

Side Lobe Level ◽

Local Optimum ◽

Pattern Synthesis ◽

Grasshopper Optimization Algorithm ◽

Grasshopper Optimization ◽

Side Lobe Suppression

Antenna arrays with high directivity, low side-lobe level, and null control in desired direction and whip antenna with wider bandwidth both need to be optimized to meet different needs of communication systems. A new natural heuristic algorithm simulating social behavior of grasshoppers, grasshopper optimization algorithm (GOA), is applied to electromagnetic field as a new effective technology to solve the antenna optimization problem for the first time. Its algorithm is simple and has no gradient mechanism, can effectively avoid falling into local optimum, and is suitable for single-objective and multiobjective optimization problems. GOA is used to optimize the side lobe suppression, null depth, and notch control of arbitrary linear array and then used to optimize the loading and matching network of 10-meter HF broadband whip antenna compared with other algorithms. The results show that GOA has more advantages in side-lobe suppression, null depth, and notch control of linear array than other algorithms and has better broadband optimization performance for HF whip antenna. The pattern synthesis and antenna broadband optimization based on GOA provide a new and effective method for antenna performance optimization.

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Acoustic Beam Forming Using Ultrasonic Transducers

Advanced Engineering Forum ◽

10.4028/www.scientific.net/aef.4.238 ◽

2012 ◽

Vol 4 ◽

pp. 238-242

Author(s):

Wen Kung Tseng

Keyword(s):

Optimization Technique ◽

Audio Signal ◽

Beam Width ◽

Side Lobe ◽

Ultrasonic Transducers ◽

Main Lobe ◽

Beam Forming ◽

Acoustic Beam ◽

Sound Beam ◽

Audible Sound

This paper evaluates the performance of acoustic beam forming using ultrasonic transducers. A directional audible sound can be generated by amplitude-modulating the ultrasound carrier with an audio signal, then transmitting it from an array of ultrasonic transducers. A novel method has been proposed in this paper to control the beam width of the main lobe and the level of the side lobe for the beam pattern by using an optimization technique. Furthermore, the weighting distribution of uniform linear array composed of eight transducers and the effect of different weightings on the spreading angle of the sound beam have been investigated through simulations in this study. The results show that the optimization method proposed in the paper can effectively control the beam width of the main lobe and the level of the side lobe for the audible sound.

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