LINEAR ARRAY DESIGN WITH DOLPH-CHEBYSHEV METHOD FOR HIGH GAIN AND SIDE-LOBE REDUCTION IN IoT APPLICATIONS

The paper introduces a linear array design utilizing the Dolph-Chebyshev method, aiming for high gain while minimizing side-lobe levels for internet of things (IoT) applications. The approach offers a balance between the parameters, enabling the attainment of the narrowest beam width for a specified side-lobe level and vice versa. While various methods exist for reducing side-lobe levels to conserve power and enhance service quality, this study focuses on a 7-element array using the Dolph-Chebyshev method. Comparative analyses of resulting patterns across different side-lobe levels reveal that increased gain and directivity are not necessarily achieved with reduced side-lobe levels. The microstrip comb-line antenna array tailored for 5 GHz IoT applications is implemented on a Rogers RO4003C substrate measuring 200 × 50 mm<sup>2</sup>, with a gain of 13 dBi. The side-lobe levels achieved are below -18 dB at 5 GHz.