Analyzing the trade-offs: non-identical antenna array elements in wireless communication systems

Abstract

In wireless communication systems, the design and optimization of antenna arrays play a crucial role in achieving desired performance metrics. Many constraints on optimizing antenna arrays to achieve minimum SLL, high Gain, and good impedance matching require a starting point to achieve the intended goal at the minimum cost. This article analyzes the trade-offs associated with utilizing non-identical elements within antenna arrays. By varying the shape, size, and arrangement of array elements, the aim is to analyze the impact on Gain and sidelobe levels. The article explores non-identical antenna arrays’ potential advantages and limitations through computational simulations. The analysis is divided into two sections: Uniform shapes with varying sizes and diverse shapes and sizes. The simulations employed advanced electromagnetic modeling software to predict the performance of different array configurations. Gain, sidelobe levels, and impedance matching were the primary parameters analyzed. Arrays with uniform shapes and varying sizes achieved a superior gain of 20 dB and recorded an SLL of 14 dB. Whereby arrays with non-uniform elements yielded a gain of 15 dB and an SLL of 8 dB. These findings suggest that non-identical antenna arrays offer distinct advantages depending on the specific performance criteria. Arrays with uniform shapes but varying sizes are highly effective in maximizing Gain, while those with diverse shapes and sizes excel in minimizing sidelobe levels. Future work could explore the balance between cost and performance, potentially incorporating more complex element variations and real-world environmental factors.

Keywords

• Array antenna
• antenna geometry
• Gain
• SLL
• Electromagnetics & communication
• electrical & electronic engineering