UWB Flexible Antenna

This chapter focuses on the design of a novel flexible antenna that operates in the Ultra-wideband (UWB) frequency range, specifically from 3.1 to 10.6 GHz. The UWB band has gained considerable attention due to its authorization by the Federal Communication Commission (FCC) and its suitability for various modern applications. The chapter presents a 4-port MIMO antenna design with an isolating structure, enabling it to operate simultaneously in the UWB, Ku, and X bands. This multi-band capability makes the antenna versatile and adaptable to a wide range of applications. Furthermore, this chapter discusses the detailed characterization of the antenna’s parameters using real measurements. The performance of the antenna is thoroughly analyzed, providing valuable insights into its efficiency, gain, and effectiveness in real-world scenarios. The optimization process of essential parameters for the antenna, including the dimensions of antenna elements and MIMO configuration, is explained in detail. This optimization ensures that the antenna design meets the desired performance criteria. An important aspect addressed in this chapter is the evolution of the decoupling structure among the antenna elements. The analysis focuses on achieving effective isolation between the different antenna ports to enable efficient MIMO operation. The obtained results are properly validated, enhancing the reliability of the presented findings. Finally, this chapter presents the measurement results of the 4-port flexible MIMO antenna. The measurements encompass various aspects, such as impedance bandwidth (both with and without bending), gain, efficiency, and MIMO diversity parameters. These measurements provide comprehensive insights into the antenna’s performance under different conditions.