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Showing result 1 - 5 of 47 swedish dissertations matching the above criteria.

2. 1. Novel RF MEMS Devices Enabled by Three-Dimensional Micromachining

   Author : Umer Shah; Joachim Oberhammer; Raafat Mansour; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Microelectromechanical systems; MEMS; Radio frequency microelectromechanical systems; RF MEMS; Micromachined transmission line; Micromachining; Tuneable capacitor; Switched capacitor; Coupled-line coupler; Tuneable directional coupler; Intermodulation distortion; MEMS varactor; Two-tone IIP3 measurement; Passive components and circuits; Reliability; Magnetic materials; NiFe multilayer composite; Permeability; Permittivity; Micromachined inductors;

   Abstract : This thesis presents novel radio frequency microelectromechanical (RF MEMS) circuits based on the three-dimensional (3-D) micromachined coplanar transmission lines whose geometry is re-configured by integrated microelectromechanical actuators. Two types of novel RF MEMS devices are proposed. READ MORE

4. 2. Micromachined Gap Waveguide Devices

   Author : Sofia Rahiminejad; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; MEMS; Gap waveguides; RF; High frequency; GHz; Waveguide;

   Abstract : Gap waveguide technology is a new technology that is well suited for millimeter and submillimeter applications. Compared to conventional rectangular waveguides, this technology does not need any solid conductive walls to confine the wave by utilizing metamaterial surfaces such as "bed of nails" that creates an artificial magnetic conductive surface (AMC). READ MORE

5. 3. Monocrystalline-Silicon Based RF MEMS Devices

   Author : Mikael Sterner; Joachim Oberhammer; Roberto Sorrentino; KTH; []
   Keywords : RF MEMS; radio frequency; microelectromechanical system; microsystem technology; monocrystalline silicon; switch; tuneable capacitor; high-impedace surface; phase shifter; rectangular waveguide; transmission line;

   Abstract : This thesis presents novel radio-frequency microelectromechanical (RF MEMS) devices, for microwave and millimeter wave applications, designed for process robustness and operational reliability using monocrystalline silicon as structural material. Two families of RF MEMS devices are proposed. READ MORE

6. 4. Silicon photonic MEMS building blocks for low-power programmable circuits

   Author : Pierre Edinger; Kristinn Gylfason; Frank Niklaus; Sangyoon Han; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Photonics; silicon photonics; MEMS; photonic MEMS; 3D printing; liquid crystals; programmable photonics; phase shifters; optical switches; ring resonators; Electrical Engineering; Elektro- och systemteknik;

   Abstract : Silicon photonics, or the confinement and control of light in integrated silicon waveguides, has rapidly grown from research labs to high-end chips for telecommunications. With the associated improvements in waveguide performance, the technology is promising for a wide range of new applications, from computing to sensing. READ MORE

7. 5. Surface-Micromachined Vertical-Cavity Micro-Opto-Electro-Mechanical Devices on InP

   Author : Nicolae Chitica; KTH; []
   Keywords : MOEMS; Optical MEMS; InP; GaInAsP; VCSEL; MOVPE; surface micromachining; tunable devices; vertical cavity devices; air-gap reflectors; III-V micromechanics;

   Abstract : .... READ MORE