Sökning: "dielectric-rod waveguide"

Hittade 4 avhandlingar innehållade orden dielectric-rod waveguide.

1. 1. Micromachined Microwave Sensors for Non-Invasive Skin Cancer Diagnostics

   Författare :Fritzi Töpfer; Joachim Oberhammer; Lennart Emtestam; Milica Popovic; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; microwave probe; microwave sensor; skin cancer diagnostics; malignant melanoma; microwave reflectometry; non-invasive diagnostics; micromachining; dielectric-rod waveguide; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : Malignant melanoma is one of the cancers with the highest incident rates. It is also the most dangerous skin cancer type and an early diagnosis is crucial for the successful treatment of malignant melanoma patients. LÄS MER

3. 2. Monocrystalline-Silicon Based RF MEMS Devices

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

   Sammanfattning : 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. LÄS MER

4. 3. Device Technology Based on High Temperature Superconductors and Microwave Breakdown in Gases

   Författare :Martin Löfgren; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; distortion; penetration depth; surface resistance; transmit-receive switch; coupled-grain model; high-power; microwave; pulse; surface impedance; breakdown; propagation; modulator; air; superconductor; transmission line; resonator; coplanar waveguide; plasma;

   Sammanfattning : This thesis deals with two separate fields of microwave technology. The first section treats microwave characterization and applications of high temperature superconducting (HTS) thin films, while the second section treats microwave breakdown in transmit-receive (TR) switches and in air. Within the first section, four main topics are adressed. LÄS MER

5. 4. Tunable Nanomaterials and their Applications for Terahertz Devices : Carbon Nanotubes and Silver Nanowires

   Författare :Serguei Smirnov; Dmitri Lioubtchenko; Joachim Oberhammer; Hartmut Roskos; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : The interest in terahertz (THz) technologies is growing in academia and industry. The design of electronic components at THz frequencies is relevant to application areas such as telecommunication, radar, material spectroscopy, and medical imaging and diagnosis. LÄS MER