Sökning: "Waveguide transitions"
Visar resultat 1 - 5 av 16 avhandlingar innehållade orden Waveguide transitions.
1. Gap Waveguide Technology- Electromagnetic Packaging and Transitions
Sammanfattning : The scarcity of available frequency bands for new wireless communication systems, as well as the growing need for higher capacity, motivates the current interest in moving upwards in frequency. The millimeter wave frequencyrange is very attractive to allocate potential commercial opportunities such as short range wireless communications that allow high-speed data/video transmission, and automotive radars for both driver assistance and increasedsafety. LÄS MER
2. Exploiting the Terahertz Spectrum with Silicon Micromachining : Waveguide Components, Systems and Metrology
Sammanfattning : The terahertz spectrum (300 GHz - 3 THz) represents the final frontier for modern electronic and optical systems, wherein few low-cost, volume-manufacturable solutions exist. THz frequencies are of great scientific and commercial interest, with applications as diverse as radio astronomy, sensing and imaging and wireless communications. LÄS MER
3. Microsystem technology for microwave applications at frequencies above 100 GHz
Sammanfattning : The rapid development of wireless technology today shows an increasing need forelectromagnetic components operating at even higher frequencies. Higher frequencies offer wider bandwidth, higher spatial resolution and are needed for technologies such as automotive car radars, wireless media communication and body scanners. LÄS MER
4. Topology optimization of antennas and waveguide transitions
Sammanfattning : This thesis introduces a topology optimization approach to design, from scratch, efficient microwave devices, such as antennas and waveguide transitions. The design of these devices is formulated as a general optimization problem that aims to build the whole layout of the device in order to extremize a chosen objective function. LÄS MER
5. Gap waveguide for packaging microstrip filters & investigation of transitions from planar technologies to ridge gap waveguide
Sammanfattning : Gap waveguide technology has proved to constitute an effective alternative for the design of microwave passive components, due to its advantages with respect to traditional planar technologies and standard waveguides. There is no requirement for conductive contact between the two different metal pieces making up a gap waveguide prototype, since one of these pieces makes use of a textured surface that eliminates any possible leakage of the field through the gap to the surface of the other metal piece above it. LÄS MER