## 2 Overview of Published Papers
The fabricated prototype validates the design process, showing promising results for applications where stable gain and wide filtering are crucial. [PERSON] et al. (contribution 36) contribute a conformal frequency-reconfigurable antenna catering to smart portable devices. With a focus on flexibility and multi-frequency operation, the antenna employs a coplanar waveguide-fed slotted circular patch. The integration of a frequency-reconfigurable element enhances its adaptability to various operating bands, making it suitable for modern wireless devices. Addressing the demands of 5G millimetre-wave communications, [PERSON] and colleagues (Contribution 37) present a wideband, circularly polarised magnetoelectric (CP ME) dipole antenna operating at 28 GHz. The unique geometry, including metallic plates and hook-shaped strips, enables stable gain and wideband characteristics. The antenna's compact footprint makes it well-suited for 5G smart devices and sensors. [PERSON] et al. (contribution 38) tackle the challenges associated with massive MIMO systems, proposing hardware-efficient solutions with optimal antenna selection. By evaluating low-resolution digital-to-analogue conversion and antenna selection techniques, the authors aim to reduce power consumption and enhance energy efficiency in massive MIMO systems. The study by [PERSON] et al. (contribution 39) explores the influence of conformal metasurfaces on passive beam steering. The research introduces a passive approach to beam steering, utilising conformal metasurfaces on conventional patch antennas. The simplicity of the proposed system, combined with its passive nature, holds promise for low-power consumption beam steering systems. The research from [PERSON] et al. (contribution 40) introduces a novel rotating shutter antenna designed for ultra-low-frequency (ULF) communication, with a focus on its potential application as a transmitter for magnetic induction (MI) underground communication systems. The authors employ advanced simulations and experiments to validate the antenna's performance, showcasing its ability to generate 2 FSK signals in the ULF band. The proposed rotating shutter antenna holds promise for enhancing communication in challenging environments, such as underground spaces. The article by [PERSON] (contribution 41) delves into the over-the-air testing of a massive multiple-input multiple-output (MIMO) antenna. The paper presents an innovative testing method involving a full-rank channel matrix created through a fading emulator with a minimal number of scatterers. By virtually positioning scatterers through antenna rotation, the study demonstrates a practical approach to assessing the performance of massive MIMO systems. This methodology offers insights into the real-world functionality of large-scale antenna arrays. [PERSON] et al. (contribution 42) propose a planar four-element ultrawideband (UWB) antenna array designed for the 6-8.5 GHz UWB frequency band. The symmetrical structure and elliptical-shaped radiators, fed by a stripline excitation network, contribute to uniform power distribution. With measured gains ranging from 6.4 to 10.8 dBi, the UWB antenna array exhibits favourable impedance matching. This research addresses the demand for high-performance antennas in the European Commission's designated UWB frequency band. [PERSON]. [PERSON] et al. (contribution 43) offer insights into the analysis and design of an X-band reflect-array antenna tailored for a medium Earth orbit (MEO) remote sensing satellite system. The study explores various reflect-array configurations, including broadside and tilted pencil beam options, optimising the antenna for a nearly constant response across the coverage area. The use of a Yagi-Uda array and a genetic algorithm (GA) optimisation method demonstrates an efficient design process for achieving a flat-top radiation pattern. In contribution 44, [PERSON] et al. address the challenge of efficiently sampling the field radiated by a circumference arc source.