## 2 Overview of Published Papers
The study introduces a mathematical expression for calculating aperture efficiency, emphasising its importance in antenna footprint patterns. This work provides valuable insights for the optimisation of antenna arrays, ensuring cost-effective solutions with enhanced performance. The work by [PERSON] et al. (contribution 8) presents a multi-layer beam-scanning leaky wave antenna for remote vital sign monitoring at 60 GHz. This antenna, equipped with partially reflecting surfaces (PRS) and high-impedance surfaces (HISs), achieves a gain of 24 dBi and precise remote vital sign monitoring up to 4 m. The system's ability to monitor vital signs in a dynamic environment, combined with its significant gain and scanning range, positions it as a promising technology for continuous health monitoring applications. In contribution 9, [PERSON] et al. propose a novel beam scanning architecture using a pair of planar metasurfaces for thin reconfigurable antennas. The design, employing on-plane varactor diodes, achieves beam scanning without the need for complex feeding networks. The demonstrated prototype in the X band offers an innovative approach to beam scanning, showcasing potential applications in satellite communications and 5G networks. [PERSON] et al. 's work (contribution 10) presents a design method for low radar cross-section (RCS) array antennas based on characteristic mode cancellation (CMC). By introducing rectangular and cross-slots, the proposed microstrip elements achieve broadband dual-linear polarisation CMC, resulting in reduced monostatic RCS for dual-linear polarised waves. This design method offers a promising solution for low-RCS array antennas with improved bandwidth and radiation performance. The paper by [PERSON] et al. (contribution 11) introduces a printed multiple-input multiple-output multiple-output (MIMO) antenna for 5G millimetre-wave applications. The antenna, featuring a compact size and good MIMO diversity performance, operates in the ultra-wideband (UWB) range from 25 to 50 GHz. The orthogonal positioning of antenna elements enhances isolation, making it a suitable candidate for future 5G millimetre-wave applications. [PERSON] et al. (contribution 12) propose a simple yet effective beamwidth broadening technique based on an antipodal linearly tapered slot antenna (ALTSA). The design achieves a quasi-hemispherical radiation pattern without increasing the overall size and complexity. With only two rows of subwavelength metallic elements, the ALTSA presents a practical solution for the wide-beam antenna design with potential applications in wide-area wireless communication systems. In contribution 13, [PERSON] and [PERSON] introduce a wideband circularly polarised cross-fed magneto-electric dipole antenna. The simple geometry utilises open slots between cross-fed microstrip patches to achieve circular polarisation and high stable gain across a wide frequency band. The proposed antenna, with a wide impedance bandwidth and in-band 3-dB axial ratio bandwidth, represents potential applications in wireless communication systems. The paper by [PERSON] et al. (contribution 14) presents a cognitive radio-integrated antenna system with 1 sensing and 24 communication antennas. The system, catering to different operating bands, demonstrates good diversity characteristics and mutual coupling. The proposed design offers a comprehensive solution for spectrum utilisation efficiency in cognitive radio applications. The work by [PERSON] et al. (contribution 15) introduces a conformal cylindrical phased array antenna excited with composite right-/left-handed (CRLH) phase shifters. The novel aspect involves embedding magneto-static field-responsive micron-sized particles into the CRLH phase shifter structure, enabling variable phase shifts without increasing the insertion loss or phase error. The proposed antenna, operating in the C-band (5-6 GHz), exhibits low insertion loss and phase error, making it suitable for a printed and flexible electronics design.