Flexible exponential weighting function toward side lobe suppression in antenna arrays

2016 ◽  
Author(s):  
Sajjad Abazari Aghdam ◽  
Jonathan Bagby ◽  
Raul J. Pla
Keyword(s):  
Antenna Arrays ◽  
Weighting Function ◽  
Side Lobe ◽  
Exponential Weighting ◽  
Side Lobe Suppression

scholarly journals Printed Antenna Arrays with High Side Lobe Suppression

2008 ◽  
Vol 2008 ◽  
pp. 1-6
Author(s):  
Aleksandar Nešić ◽  
Ivana Radnović ◽  
Zoran Mićić
Keyword(s):  
Antenna Array ◽  
Antenna Arrays ◽  
Low Cost ◽  
Microwave Circuits ◽  
Side Lobe ◽  
Printed Antenna ◽  
Feed Network ◽  
New Type ◽  
Side Lobe Suppression ◽  
Better Than

The problem of side lobe suppression (SLS) in printed antenna arrays has been investigated in the paper. Influence of several factors that make difficult design and realization of antenna arrays with relatively high SLS has been analyzed. We introduced a new type of printed antenna array with symmetrical pentagonal dipoles and symmetrical tapered feed network with Chebyshev distribution enabling SLS better than 34 dB in E-plane. Agreement between simulated and measured results is very good. The antenna is suitable for integration with other microwave circuits. Presented antenna is low cost and very simple for realization.

scholarly journals Definition of the border between the far and near field zone for printed antenna arrays with high side lobe suppression

2013 ◽  
Vol 10 (1) ◽  
pp. 113-124
Author(s):  
Marija Milijic ◽  
Aleksandar Nesic ◽  
Bratislav Milovanovic
Keyword(s):  
Antenna Arrays ◽  
Near Field ◽  
Side Lobe ◽  
Printed Antenna ◽  
Field Zone ◽  
High Side ◽  
Radiating Element ◽  
Limited Application ◽  
Definition Of ◽  
Side Lobe Suppression

The paper defines the border between the far and near field zone of printed antenna arrays. The conventional definition has a limited application in side lobe suppression measurements, especially in the case of high side lobe suppression. The paper particularly details the printed antenna array with 8 radiation elements. Its symmetrical tapered feed network with Chebyshev distribution enables side lobe suppression greater than -44 dB in the E-plane. In addition, the influence of tolerances in the standard photolithographic process has been investigated. The expected tolerances in the standard photolithographic process have been assumed with moderate precision in order to estimate the side lobe suppression degradation due to amplitude and phase deviations, as well as deviations to optimized values in radiating element positioning.

scholarly journals An investigation of side lobe suppression in integrated printed antenna structures with 3D reflectors

2017 ◽  
Vol 30 (3) ◽  
pp. 391-402
Author(s):  
Marija Milijic ◽  
Aleksandar Nesic ◽  
Bratislav Milovanovic
Keyword(s):  
Antenna Array ◽  
Radiation Pattern ◽  
Antenna Arrays ◽  
Amplitude Distribution ◽  
Side Lobe ◽  
Printed Antenna ◽  
Side Lobe Suppression

The paper discusses the problem of side lobe suppression in the radiation pattern of printed antenna arrays with different 3D reflector surfaces. The antenna array of eight symmetrical pentagonal dipoles with corner reflectors of various angles is examined. All investigated antenna arrays are fed by the same feeding network of impedance transformers enabling necessary amplitude distribution. Considering the different reflector surfaces, the influence of parasitic radiation from feeding network on side lobe suppression is studied to prevent the reception of unwanted noise and to increase a gain.

Study of SAR Side-lobe Suppression Based on Compressed Sensing

2011 ◽  
Vol 32 (12) ◽  
pp. 3022-3026 ◽  
Author(s):  
Bo Kou ◽  
Hai Jiang ◽  
Lei Liu ◽  
Bing-chen Zhang
Keyword(s):  
Compressed Sensing ◽  
Side Lobe ◽  
Side Lobe Suppression

scholarly journals A Side-Lobe Suppression Method Based on Coherence Factor for Terahertz Array Imaging

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 5584-5588 ◽  
Author(s):  
Yanwen Jiang ◽  
Yuliang Qin ◽  
Hongqiang Wang ◽  
Bin Deng ◽  
Kang Liu ◽  
...  
Keyword(s):  
Side Lobe ◽  
Coherence Factor ◽  
Suppression Method ◽  
Array Imaging ◽  
Side Lobe Suppression

scholarly journals Null Steering in Failed Antenna Arrays

2011 ◽  
Vol 2011 ◽  
pp. 1-9 ◽  
Author(s):  
Om Prakash Acharya ◽  
Amalendu Patnaik ◽  
Sachendra N. Sinha
Keyword(s):  
Antenna Array ◽  
Antenna Arrays ◽  
Side Lobe ◽  
Side Lobe Level ◽  
Correction Procedure ◽  
Swarm Optimization ◽  
Array Pattern ◽  
Null Steering ◽  
Simulation Results ◽  
Pattern Simulation

Antenna array pattern nulling is desirable in order to suppress the interfering signals. But in large antenna arrays, there is always a possibility of failure of some elements, which may degrade the radiation pattern with an increase in side lobe level (SLL) and removal of the nulls from desired position. In this paper a correction procedure is introduced based on Particle Swarm Optimization (PSO) which maintains the nulling performance of the failed antenna array. Considering the faulty elements as nonradiating elements, PSO reoptimizes the weights of the remaining radiating elements to reshape the pattern. Simulation results for a Chebyshev array with imposed single, multiple, and broad nulls with failed antenna array are presented.

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