Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 6 of 6 for “"millimetre waves"”.
-
Defect modes in electromagnetic bandgap structures for micro- and millimetre waves
… in a way that the flow of electromagnetic waves could be controlled by the creation of a band structure for allowed and forbidden states: the so called "electromagnetic bandgap". It was found out that such structures could exhibit improved properties that could not be achieved with …
-
Design of mobile radio communication system at millimetre-waves and BER measurements for indoor environments
The demand for wireless broadband multimedia services, seeks exploitation of the widely available spectrum surrounding the 60 GHz operating frequency, which can support high speed indoor WLANs. The need to estimate the system performance in indoor mobile channels is necessary for future system …
-
Two-dimensional periodic surface lattice high power millimetre wave experiment
Millimetre wave radiation generation from a free electron maser based on a two-dimensional (2D) periodic surface lattice has been demonstrated. Second harmonic Gyrotron Backward Wave Oscillator (BWO) interaction with a two dimensional periodic surface lattice (PSL) has been observed. The major …
-
Multiphysics algorithms for the simulation of geological materials under extreme conditions: the evolution and transport of ablated material
… at this task due to severe wearing effects. Millimetre wave (MMW) drilling is a non-contact technology that uses directed millimetre waves produced by a gyrotron to vaporise and ablate bedrock, creating a borehole cavity, with the vaporised material being removed by a purge gas. As an …
-
Improvements to the modelling of radiowave propagation at millimetre wavelengths. In-depth studies are reported on resonance phenomena in the scattering of spherical ice particles, extinction and backscattering properties of clouds and on the absorption and dispersion spectra of atmospheric gases.
… mechanisms that affect radiowave propagation at millimetre wavelengths are considered. Current modelling weaknesses are highlighted and new improved models or more appropriate modelling approaches are suggested. Interference and resonance phenomena in the scattering of spherical ice and water …
-
Efficient radio resource management for the fifth generation slice networks
… degradation of the path loss associated with millimetre waves. Second, this thesis examines the resource allocation challenge in a multi-tenant multi-slice multi-tier heterogeneous network. To maximise the total utility of a multi-tenant multislice multi-tier heterogeneous network, a …