The thesis contributes to the future operation of the Super Proton Synchrotron at CERN and to the numerous efforts that ensure the long-term physics performance of the Large Hadron Collider. An increased mitigation of higher order electromagnetic modes in the travelling wave acceleration system of the SPS is required to ensure delivery of the high intensity particle beam desired in the future. The proposed solutions are developed from theory as well as simulations and tested in measurements.

Microwave absorbers are used to improve the communication system performance. They can be classified into non-resonant and resonant absorbers. In band-limited applications, where the size of the microwave absorber is required to be physically small or when the unwanted scatterers are located in the proximity of the antennas, the resonant absorbers can provide better solutions. Major design challenges of these absorbers are increasing the bandwidth, improving the parameters performances (i.e., reflection coefficient, isolation, noise suppression), and producing them with a lower cost and a...

Centralized-Radio Access Network (C-RAN) offers promising potential for efficient management of radio resources and computing resources, which is necessary for meeting the Quality of Service (QoS) demands in an interference-limited network. However, its implementation faces several technical challenges. Traditional association strategies are not suitable for the high density networks and cooperative transmission techniques. Furthermore, the efficacy of cooperative transmission techniques is dependent on fronthaul capacity and Channel State Information (CSI) accuracy, which are often...

This dissertation establishes a novel framework to automate site-specific wireless channel model generation via Deep neural networks. An approach for ray tracing and creation of distribution-free channel modeling by generative adversarial networks is proposed.Moreover, a communication network consist of deep neural network transceivers is presented for the next generation of communication.

One of the critical enablers of the ever-growing wireless communication and radar technologies revolution is the low-cost, high-gain antenna, specifically, the uniform linear array (ULA) antenna. However, the ULAs have a critical issue called grating lobe that limits array designs. This dissertation thoroughly discusses this issue, presenting different methods to push the antenna array design beyond the conventional limits, especially in the microstrip patch ULAs.The first proposed solution is based on suppressing the wave propagating toward the grating lobe direction along the array aperture...

Antenna measurements are significantly affected by the environment. Therefore, the measurements are usually carried out in precisely constructed anechoic chambers which are covered with absorbers to create an interference-free and high-quality test zone. However, this is associated with high costs. Hence, intensive research is being conducted on echo reduction methods to be capable of performing antenna measurements with reasonable accuracy also in low-quality test zones. An accurate technique will consequently not only reduce the costs but also the complexity of the facilities as the...