A comprehensive overview of recent developments in RF-MEMS technology-based high-performance passive components for applications in the 5G and future telecommunications scenarios

Abstract

The goal of this work is to provide an overview about the current development of radio-frequency microelectromechanical systems technology, with special attention towards those passive components bearing significant application potential in the currently developing 5G paradigm. Due to the required capabilities of such communication standard in terms of high data rates, extended allocated spectrum, use of massive MIMO (Multiple- Input-Multiple-Output) systems, beam steering and beam forming, the focus will be on devices like switches, phase shifters, attenuators, filters, and their packaging/integration. For each of the previous topics, several valuable contributions appeared in the last decade, underlining the improvements produced in the state of the art and the chance for RFMEMS technology to play a prominent role in the actual implementation of the 5G infrastructure.

MEMS Switch Realities: Addressing Challenges and Pioneering Solutions

“…In practical terms, isolation quantifies the extent to which signals directed to one port of the switch are isolated from signals at other ports when the switch is in the "off" state. The goal is to minimize leakage or coupling between ports, ensuring that signals intended for a specific path do not interfere with or affect signals in other paths [57]. This is especially critical in communication systems and RF circuits, where unwanted signal interactions can lead to the degradation of system performance.…”