Research Staff: Prof Jason Hong
Funder: U.K. Engineering and Physical Science Research Council
Collaborator: SELEX Sensors and Airborne Systems Limited
Ultra wideband (UWB) is one of the recent radio-frequency (RF) device technologies for emerging wireless applications. To send information with high data rate through the air, UWB uses low-power transmission of high-speed pulsed ratio signals. UWB technology has a wide range of potential applications, such as wireless communications and imaging radar systems, where high-capacity multiple access and ultra high speed transmission up to several hundreds of Mbps can be implemented. However, with the expansion of wireless communications and services, the available RF spectrum is growing scarce. This is a particular problem for UWB technologies, because UWB pulses are very short or narrow, and so they result in a wide transmission bandwidth (several GHz to several tens of GHz or so). As a result, UWB wireless systems must be able to operate in parts of the RF spectrum that are already used by existing radio services. Since filtering technologies are key to controlling the spectrum of RF signals and tackling interference issues, this research programme was aimed to develop advanced UWB filters based on liquid crystal polymer (LCP) multilayer circuit technologies for future UWB wireless communications and radar systems.