Sökning: "aperture coupled patch"
Hittade 4 avhandlingar innehållade orden aperture coupled patch.
1. Analysis of Dipole and Patch Antennas in Cylindrical Structures
Sammanfattning : This thesis deals with the analysis of dipoles, patches, and aperture coupled patches located in an infinitely long cylindrical structure with arbitrary cross-section. The analysis exploits the two-dimensional nature of the structure by expanding all fields and currents in spatial harmonics along the cylinder axis, and solving the subsequent spectral two-dimensional problems by the moment method. LÄS MER
2. Analysis and Design of Base Station Antennas for Mobile Communications
Sammanfattning : The thesis deals with base station antennas and the environment they work in. Polarization diversity, dual band operation, and adaptive antenna systems are discussed with emphasis on how antennas for these applications should be designed. We compare the polarization diversity performance of different types of dual polarized antenna elements. LÄS MER
3. Polarization diversity and array signal processing in base station antennas
Sammanfattning : .... LÄS MER
4. Active and Passive Unequally Spaced Reflect-Arrays and Elements of RF Integration Techniques
Sammanfattning : Using an array synthesis tool based on a modified differential evolution algorithm, it is shown that the position-phase synthesis exhibits improved pattern characteristics compared to both the phase only and position only synthesis of uniform amplitude antenna arrays. The design of an unequally spaced planar reflect-array and an active power combining reflect-array are presented. LÄS MER