Sökning: "helical antenna"
Hittade 4 avhandlingar innehållade orden helical antenna.
1. Characterization of artificially soft surfaces and their applications in antenna design
Sammanfattning : .... LÄS MER
2. Novel RF MEMS Devices for W-Band Beam-Steering Front-Ends
Sammanfattning : This thesis presents novel millimeter-wave microelectromechanical-systems (MEMS) components for W-band reconfigurable beam-steering front-ends. The proposed MEMS components are novel monocrystalline-silicon dielectric-block phase shifters, and substrate-integrated three-dimensional (3D) micromachined helical antennas designed for the nominal frequency of 75 GHz. LÄS MER
3. Electromagnetic Simulation, Analysis and Design with Application to Antennas and Radar Absorbers
Sammanfattning : The present thesis considers two different subjects in the research area of electromagnetics. The first part is concerned with antenna design and the second with radar absorbers and rasorber.In the first part, a novel excitation technique for cylindrical dielectric resonator antennas is introduced to produce circular polarization. LÄS MER
4. Functional studies on the Light-harvesting-Like (LiL) Proteins in Cyanobacteria and Cryptophytes
Sammanfattning : The light-harvesting like (LiL) proteins are a widely spread group of proteins within photosynthetic organisms. They are membrane proteins composed of one to four transmembrane helices and – in homology to the light-harvesting complexes of algae and higher plants – at least one of these transmembrane helices contains the chlorophyll a/b-binding (CAB) domain. LÄS MER