Sökning: "dielectric resonator"

Visar resultat 1 - 5 av 22 avhandlingar innehållade orden dielectric resonator.

1. 1. Low phase noise voltage controlled micro- and millimeter wave oscillators

   Författare :Stefan Andersson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; radio; anti series; microstrip resonator; silicon bipolar transistor; amplitude limiter; cavity resonator; varactor; transposed gain; MESFET; automatic gain control; VCO; delay line; laser; RF; oscillation criteria; millimetre wave; oscillator; mm-wave; noise; multiplier; fibre optic; SAW; DRO; PLL; surface acoustic wave; Si BJT; 1 f noise; FM noise; HEMT; clipping diode; HBT; YIG sphere; device; terfenol; gunn diode; stabilised; YIG film; quarts crystal; phase locked loop; magnetostrictive; resonator; phase error; whispering gallery mode; sapphire resonator; Fabry-Perot resonator; PHEMT; microwave; HFET; phase noise; DR; dielectric resonator; PM noise; balanced oscillator; piezo electric; AGC; frequency discriminator;

   Sammanfattning : .... LÄS MER

3. 2. 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

4. 3. Reactive Sputter Deposition of Functional Thin Films

   Författare :Lina Liljeholm; Jörgen Olsson; Ilia Katardjiev; Tomas Nyberg; Gonzalo Fuentes Iriarte; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; thin film; reactive sputtering; coating; resonator; sensor; FBAR; SMR; aluminum nitride; Al; B N; Teknisk fysik med inriktning mot elektronik; Engineering Science with specialization in Electronics;

   Sammanfattning : Thin film technology is of great significance for a variety of products, such as electronics, anti-reflective or hard coatings, sensors, solar cells, etc. This thesis concerns the synthesis of thin functional films, reactive magnetron sputter deposition process as such and the physical and functional characterization of the thin films synthesized. LÄS MER

5. 4. On the Dielectric Losses of Polyethylene at Medium and High Frequencies

   Författare :Martin Strååt; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Dielectric properties; foaming; crystallinity; polyethylene; frequency; porosity;

   Sammanfattning : AbstractAs mobile communication moves from 3G to 4G, the bandwidth used will be extended from 2 GHz to 5 GHz. The propagation loss is related to the 2.6:th power of frequency, thus a large increase in power consumption may be expected. LÄS MER

7. 5. RF-microwave sensor development for cell and human in vitro and ex vivo monitoring

   Författare :Joni Kilpijärvi; Jari Juuti; Kajsa Uvdal; Anita Lloyd Spetz; Karol Malecha; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cell culture monitoring; Lab-on-a-chip; Low temperature co-fired ceramic LTCC ; Microwave sensor; Interdigitated electrode IDE ; Complementary split ring resonator CSRR ; Dielectric properties; Health monitoring; Soluviljelmä monitorointi; Lab-on-a-chip; Matalan lämpötilan yhteissintrautuva keraami LTCC ; Mikroaaltoanturi; Interdigitated electrode IDE ; Complementary split ring resonator CSRR ; Dielektriset ominaisuudet; Terveys monitorointi; Övervakning av cellodling; Lab-on-a-chip; Låg temperatur keramik LTCC ; Mikrovågssensor; Interdigitated electrode IDE ; Complementary split ring resonator CSRR ; Dielektrisk mätning; Hälsoövervakning; Mikrovågssensor;

   Sammanfattning : In this research new RF/microwave-based sensor solutions were developed for the monitoring of biological cells and human beings to obtain a better understanding of their activity or state in a quick, cheap, easy and continuous way. The effect of different substances on cell behaviour can be monitored by measuring the electrical environment where changes are observed as cells react to a stimulus. LÄS MER