concentric-ring antenna array
Design of a Fully Digital Controlled Reconfigurable Switched Beam Concentric Ring Array Antenna Using Firefly and Particle Swarm Optimization Algorithm
... Reconfigurable antenna arrays received considerable interest in recent times because of their ability to radiate multiple patterns from a single antenna array, which are often required in ...
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Fast Synthesis of Large Planar Arrays Using Active Element Pattern Method and Fine-Grained Parallel Micro-Genetic Algorithm
... excited array [19, 20]. The AEP is defined as the antenna pattern of a single excited element in the array, and all other elements terminated in matched ...planar antenna array with ...
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Analysis of Concentric Split Ring Square Element for Broadband Reflectarray Antenna
... reflectarray antenna combines some of the best features of reflector and array ...flat array of microstrip patches or dipoles printed on a thin dielectric ...feed antenna illuminates the ...
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Generation of Narrow Beams using Differential Evolution Algorithm from Circular Arrays
... in antenna design for generating low sidelobe patterns as they have radial symmetry and an invariant beam in the azimuthal ...from concentric circular arrays by optimizing both ring radii and ...
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Low-Profile Omnidirectional Antenna with Dual Polarizations for 2.4 GHz WLAN Applications
... dual-polarized antenna is shown in Fig. 1. It comprises an annular ring slot antenna and a printed arc dipole array, both printing on a double-layer FR4 substrate with different ...annular ...
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Comparative Performance of Gravitational Search Algorithm and Modified Particle Swarm Optimization Algorithm for Synthesis of Thinned Scanned Concentric Ring Array Antenna
... planar array in the x-z plane directs the beam peak to any direction off the broadside along the same ...in concentric ring array of isotropic antennas scanned in the x-z plane result in a ...
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Design of Fully Digital Controlled Reconfigurable Dual-Beam Concentric Ring Array Antenna Using Gravitational Search Algorithm
... a concentric ring array [7–18] with desired design specifications by switching the optimum 5-bit discrete radial phase of the array elements while sharing a common optimum 4-bit discrete ...
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On the Design of Concentric Ring Arrays for Isoflux Radiation in Meo Satellites Based on PSO
... for antenna arrays includes the design for antenna arrays with uniform spacing [5, ...an antenna array with non- uniform distribution of the elements could be considered because a non- uniform ...
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Mutual Coupling Reduction Between Printed Dual-Frequency Antenna Arrays
... In this paper, mutual coupling reduction in a printed dual-frequency monopole array using simple defected ground structures is presented. The proposed dual-frequency DGS consists of two concentric split ...
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Concentric Circular Antenna Array Synthesis Using Comprehensive Learning Particle Swarm Optimizer
... CLPSO algorithm, the population size is set to 120, iteration cycles for optimization = 1000, and c = 1. The simulation is made by MATLAB. We use MATLAB Release 2011a on a core 2 duo processor, 2.00 GHz with 2 GB RAM. ...
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Analysis of Ten Concentric Circular Ring Antenna Array for Radar and Wireless Applications
... Concentric ring arrays (CRA) antennas used for direction finding. Ring arrays are produced directional patterns and it scan 360 degrees ...with concentric ring antennas. Ruban Das [3] ...
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Design of Dual Pattern Concentric Ring Array Antenna Using Differential Evolution Algorithm with Novel Evolutionary Operators
... Abstract—Concentric ring antenna arrays with the ability to produce dual pattern have many applications in communications and radar ...reconfigurable concentric ring array with ...
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Wideband and Low Sidelobe Linear Series Fed Yagi-Like Antenna Array
... Printed antenna arrays have gained a great deal of attention and impetus for use in telecommunication systems such as point to point and point to multipoint and also in radar microwave and millimeter systems ...in ...
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Enhanced "vector-cross-product" direction-finding using a constrained sparse triangular-array
... the array geometry in Figure 1 is used with the additional antenna as a scalar ...the array-aperture significantly and following this, the DOA estimation accuracy is ...posed array geometry ...
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Broadband Waveguide-Fed 8-by-1 Gap-Coupled Microstrip Antenna Array for 60-GHz Short-Range Point-to-Point Wireless Communications
... In the proposed configuration, eight optimized isosceles trapezoid patches are introduced at a proper distance from each driven element to maintain an appropriate coupling level. However, to investigate the size effect of ...
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Cross-Polarization Reduction of E-Shaped Microstrip Array Using Spiral-Ring Resonator
... Recently many new technologies have been proposed for reducing XP level of multi-element antenna systems. For example, some degree of orthogonally polarized fields is always associated with the radiating energy, ...
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Wideband Metamaterial Solar Cell Antenna for 5 GHz Wi-Fi Communication
... the antenna element [11, 12] or using transparent conductive antennas ...the antenna structure to modify the RF response to achieve wideband ...the antenna structure without effecting the solar ...
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Left-handed metamaterial incorporated with microstrip antenna
... Microstrip antenna suffered low ...using array of patch ...microstrip antenna will increased the gain of the microstrip ...the antenna that integrates with the Left Handed Metamaterial ...
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A Moment-Based Study on the Impedance Effect of Mutual Coupling for VLF Umbrella Antenna Arrays
... umbrella antenna array with the single voltage source are shown in Figure ...umbrella antenna has a higher Q value; the communication frequency band is very ...the antenna is small and ...
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Steerable array antenna
... Adaptive array antenna is the best candidate to overcome this phenomenon (Godara, ...adaptive array (RSAA) using dipole antenna. This antenna is an adaptive array with single ...
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