###### Abstract
This design is particularly well-suited for wireless communication systems and portable devices, due to its compact size and excellent performance across the UWB frequency range. [PERSON] et al. [12] present an innovative concept for a tunable reflector metasurface (MS) that enables beam steering at 28 GHz. This has been achieved by using varactor diodes as the tunability component in unit cells of the metasurface. This new concept, called the \"stripes configuration\", leads to remarkable enhancements in beam steering capabilities. The results demonstrated a 3 dB improvement in reflectance gain, depending on the scanning angle, compared to a uniform metasurface with just one stripe. Moreover, the stripes configuration showcased an impressive enhancement of 50% in the steering accuracy of the angle for various frequencies. [PERSON] et al. [13] offer a high-gain and compact antenna that offers both low backscattering and improved gain characteristics. The antenna's construction involves a cavity formed by combining an absorptive Frequency Selective Surface (FSS) with a double-sided Partially Reflective Surface (PRS), placed above a patch resonator. This configuration achieves a wideband Radar Cross Section (RCS) reduction in incident waves, including in-band frequencies. The results demonstrate a wideband RCS reduction from 4 to 16 GHz, with an average RCS reduction of approximately 8.5 dB compared to a reference patch antenna. Additionally, the antenna achieves off-broadside peak radiation at an angle of \(-38^{\circ}\), with a gain approaching around 9.4 dB. [PERSON] et al. [14] explore a novel multi-node inverse Finite Element Method (iFEM) for sensing the shape of flexible structures using strain sensors. In accordance with the Mindlin plate theory, a weighted-least-squares function is minimized by considering all strain measures. This approach enables accurate approximation for large inverse finite elements, providing the advantage of simultaneous extrapolation and interpolation calculations for elements. By substantially expanding the size of elements, the proposed method decreases the number of sensors required while improving the accuracy of the reconstruction process. This innovation holds promise for enhancing shape-sensing capabilities in flexible structures, and can lead to more efficient and accurate strain measurement systems. [PERSON] et al. [15] introduce a novel method for generating multiple pseudo-Bessel beams, with precise control over their propagation directions using a reflective metasurface. In this technique, the reflective metasurface's miniaturized unit cell modulates the electromagnetic waves, generating pseudo-Bessel beams that are propagated in various directions off-axis. This metasurface is capable of generating dual pseudo-Bessel beams, and their propagation directions can be accurately controlled. The efficiency of these beams is measured at 59.2% when propagated at 400 mm. Overall, the method showcases the promising potential for producing high-efficiency multiple beams with precise control, which could find applications in various fields. We would like to sincerely express our gratitude and appreciation to all the esteemed authors whose exceptional contributions have enriched this journal. Their valuable research has significantly advanced the field of design, analysis, and measurement of antennas. Our heartfelt thanks go out to the diligent reviewers whose insightful comments and feedback have played a crucial role in enhancing the quality of these articles. Their expertise and dedication have been instrumental in ensuring the rigor and accuracy of the published works. We also extend our acknowledgment to the dedicated editorial board and the supportive editorial office of MDPI's _Applied Sciences_ journal. Their guidance and assistance throughout the publication process have been invaluable in bringing this collection to fruition.