Sökning: "loss tangent"

Visar resultat 11 - 15 av 21 avhandlingar innehållade orden loss tangent.

1. 11. Processing and On-Wafer Test of Ferroelectric Film Microwave Varactors

   Författare :Jang-Yong Kim; Alexander Grishin; Dag Winkler; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; : ferroelectrics; sodium potassium niobates; silver tantalite niobate; barium strontium titanate; thin films; pulsed laser deposition; rf magnetron sputtering; coplanar waveguide; photolithography; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik;

   Sammanfattning : Microwave materials have been widely used in a variety of applications ranging from communication devices to military satellite services, and the study of materials properties at microwave frequencies and the development of functional microwave materials have always been among the most active areas in solid-state physics, materials science, electrical and electronic engineering. In recent years, the increasing requirements for the development of high speed, high frequency circuits and systems require complete understanding of the properties of materials function at microwave frequencies. LÄS MER

3. 12. Processing and Properties of Ferroelectric Ag(Ta,Nb)O3 Thin Films

   Författare :Jung-Hyuk Koh; KTH; []
   Nyckelord :Ferroelectric; Thin Film; PLD; Tunable device;

   Sammanfattning : High tunability and low loss tangent of ferroelectric thinfilms offer unique opportunity for the development of variousmicrowave devices. Silver tantalate niobate, which showsexcellent microwave properties, was selected for this study. LÄS MER

4. 13. Novel tantalate-niobate films for microwaves

   Författare :Jang-Yong Kim; Alex Grishin; Andrey B. Kozyrev; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ferroelectrics; sodium potassium niobates; silver tantalate niobate; barium stronitium titanate; Electronics; Elektronik;

   Sammanfattning : Microwave materials have been widely used in a variety of applications ranging from communication devices to military satellite services, and the study of materials properties at microwave frequencies and the development of functional microwave materials have always been among the most active areas in solid-state physics, materials science, and electrical and electronic engineering. In recent years, the increasing requirements for the development of high speed, high frequency circuits and systems require complete understanding of the properties of materials function at microwave frequencies. LÄS MER

5. 14. Ferroelectric Thin Films on Si-substrate for Tunable Microwave Applications

   Författare :Saeed Abadei; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Phase shifter; BaxSr1-xTiO3; Tunable microwave device; Ferroelectric Varactor; Paraelectric; Filter; Na0.5K0.5NbO3; Integrated ferroelectric device; SrTiO3; Ferroelectric;

   Sammanfattning : The thesis presents the development of microwave tunable devices based onferroelectric thin films. The main tasks in this work are the fabrication, optimization, andintegration of ferroelectric thin film into Si-MMIC. LÄS MER

7. 15. ORMOCER Materials Characterization, LAP- & Micro-Processing : Applied to Optical Interconnects and High-Frequency Packaging

   Författare :Steffen Uhlig; Mats Robertsson; Peter van Daele; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Optical interconnects; Optical Backplanes; ORMOCER; SBU-technology; high-frequency packaging; surface characterization; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik;

   Sammanfattning : ORMOCERR®s are organic-inorganic hybrid polymers. Since their material properties can be tailored precisely during synthesis, they are suitable for a wide range of applications in dielectric and optical microelectronics. LÄS MER