Designing large-scale antenna array using sub-array

Abstract

Antenna array of large scale have been examined for different applications including 5G technology. To get better data rate or a reliable link substantial number of antenna arrays have been utilized to provide high multiplexing gains as well as array gains with high directivity. In this paper a simple but efficient implementation technique of using sub-arrays for the improvement of large-sized uniform arrays. By repeating a small sub-array multiple times large arrays can be designed. This implication of utilizing small array simplifies the design of a larger array which allows the designer to concentrate on the smaller sub-array before assembling larger arrays. So, by investigating the sub arrays the performance and radiation characteristics of large arrays can be anticipated. The array-factor for a planar sub-array of 2x2 (4 elements) is analyzed using Mat-lab software and then a large array is formed by placing the 2x2 sub-array indifferent configurations in a rectangular arrangements up to 8x8 planar array. And then the results are validated with CST (Computer simulation technology) simulation results.In this way the array-factors, directivities, HPBWs, and side lobes of the constructed large arrays are analyzed and associated with the small sub-array.

Patterns of sidemount four-bay FM antenna system

“…Referring to Figure 4(a), the array has a maximum power gain of 6.802 (8.326 dBi) at 70 0 on the horizontal plane; the circularity is ±0.031 dB, which is better than the circularity of a bay. As discussed in [16][17][18][19][20][21][22], all collinear arrays have minor lobes in the radiation pattern. The elevation pattern shown in Figure 4 (b) is produced with the cutting plane passing through the x-z plane.…”

Characterization and Optimization of a Collinear Array of Circularly Polarized Side-Mounted Elements

“…However, there are problems that need to be addressed with the use of the array: (1) presence of pattern nulls and the adverse effects of sidelobes (minor lobes); (2) effects of the metallic tower to the bays that tend to deviate the radiation pattern, and (3) the inherent non-compliant radiation characteristics of the CPA to broadcast standards. Stacking creates minor lobes and the number of which increases with the number of stacked elements [1][2][3][4][5][6]. One of the authors of this paper has a thorough discussion (including equations) on this topic in [1].…”