Sökning: "dual-frequency"
Visar resultat 1 - 5 av 12 avhandlingar innehållade ordet dual-frequency.
1. Analysis of Conformal Antennas and Periodic Structures
Sammanfattning : In the last decades much attention has been paid to the design of high-performance antennas. Accurate control of the radiation properties is very important in electromagnetic engineering applications. LÄS MER
2. Modern numerical methods in electromagnetics applied to the design of reflector antennas and horn feeds
Sammanfattning : .... LÄS MER
3. On the analysis of soft surfaces, frequency selective surfaces and conformal antennas
Sammanfattning : .... LÄS MER
4. Sea Ice Concentration Estimation and Ice Type Classification from Dual-Frequency Satellite Synthetic Aperture Radar
Sammanfattning : The sea ice cover in the Arctic has undergone dramatic changes in recent years. The perennial sea ice extent is decreasing by 12.2 % per decade while annual mean sea ice thickness has decreased by more than 2 m for the central Arctic Basin from 1975 to 2012. LÄS MER
5. On the Analysis of Horns, Reflectors, and Periodic Structures
Sammanfattning : The design and manufacturing of a dual-frequency horn is presented. The dual-depth corrugated horn is fed by a circular and a coaxial waveguide, in the upper and lower frequency band, respectively. The reason for choosing a waveguide-only feeding network is discussed. LÄS MER