Sökning: "direktivitet"
Visar resultat 1 - 5 av 6 uppsatser innehållade ordet direktivitet.
1. Geodesic Lens Antenna for sub-THz Imaging
Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)Sammanfattning : The Millimiter Wave (mmW) frequency band, characterized by a high atmospheric attenuation and wide available bandwidth has become of big interest for high accuracy radar imaging applications. The continuous development of the Monolithic Microwave Integrated Circuit (MMIC) technology yields to the appearance of different commercial-off-the-shelf (COTS) radar transceivers at that frequency band, where the antennas are fully integrated into the chip. LÄS MER
2. Acoustic Prediction Methods for Rocket Flame Deflector Design
Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)Sammanfattning : The aim of the project behind this report is to gain an understanding for the design criteria of launch pad flame deflectors used for launching rockets. This report presents an overview of the underlying phenomena, and then tackles the issue of estimating noise levels that come about during lift-off. LÄS MER
3. Acoustic source strength determination of turbocharger in an unfavourable acoustic environment
Master-uppsats, KTH/MWL Marcus Wallenberg LaboratorietSammanfattning : The aim of the M.Sc thesis work is to specify a measurement method suitable for deter-mining the sound power levels and especially to quantifying the levels at the compressor blade pass frequency of a turbocharger in the new turbo performance rig located at Scania CV AB, Södertälje. LÄS MER
4. A Cost-Effective Luneburg Lens Based on Glide-Symmetric Metasurface for 5G Applications
Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)Sammanfattning : In this work, a cost-eective at Luneburg lens antenna operating at the Ka-band is presented.The antenna is suitable for high frequency applications in future communicationnetworks such as 5G systems due to its simple feeding, high directivity, and low loss.The lens is composed of a parallel plate structure loaded with glide-symmetric holes. LÄS MER
5. Lower bounds on the Q-factor for small oversampled superdirective arrays over a ground plane
Master-uppsats, KTH/Skolan för elektro- och systemteknik (EES)Sammanfattning : Base station antennas for next generation mobile communication networks will be required to have a wide bandwidth for compatibility and support multi-beam applications. Antenna arrays are one possible candidate for a next generation base station antenna since they can obtain high directivity, support multi-beam and wide angle scanning. LÄS MER
