Search for dissertations about: "Microwave antenna"

Showing result 1 - 5 of 68 swedish dissertations containing the words Microwave antenna.

  1. 1. Characterization of artificially soft surfaces and their applications in antenna design

    University dissertation from Chalmers University of Technology

    Author : Zhinong Ying; Chalmers tekniska högskola.; Chalmers University of Technology.; [1995]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; corrugated surface; dielectric loaded surface; magnetic coating; soft and hard surfaces; ground plane; corrugated horn; feed; GPS; multipath effect; choke-ring; moment method; UTD; antennas; surface impeddance; broadband antennas; helical antenna; spiral antenna; microstrip antenna; dipole antenna; monopole antenna; slot antenna; circular polarization;

    Abstract : .... READ MORE

  2. 2. Cylindrical Waveguide Slot Antenna Analysis

    University dissertation from Chalmers University of Technology

    Author : Johan Wettergren; Chalmers tekniska högskola.; Chalmers University of Technology.; [1997]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Elektroteknik; elektronik och fotonik; Electrical engineering; electronics and photonics; Informationsteknik; Information technology; antenna; basis function; cylinder; EFIE; integral equation; moment method; MPIE; mutual admittance; mutual coupling; slot; waveguide;

    Abstract : Waveguide slot antennas with longitudinal and transverse slots are analyzed using a rigorous method. The antennas are divided into regions, which are analyzed separately and matched by a moment method procedure. At the apertures between the regions, the electric fields are expanded in trigonometric basis functions. READ MORE

  3. 3. Microwave contact free measurements in metallurgical processes

    University dissertation from Chalmers University of Technology

    Author : Donald Malmberg; Chalmers tekniska högskola.; Chalmers University of Technology.; [2000]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; microwave; antenna; refractive index; metallurgical processes; slag thickness measurements; level measurements; gas analysis; signal analysis;

    Abstract : .... READ MORE

  4. 4. Antenna Integrated Superconducting Mixers

    University dissertation from Chalmers University of Technology

    Author : Hans Ekström; Chalmers tekniska högskola.; Chalmers University of Technology.; [1995]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Fysik; Physics; hot electron; bolometer; superconducting; Niobium; Niobium Nitride; SIS; trilayer junction; edge junction; mixer; receiver; tapered slotline antenna; double dipole antenna;

    Abstract : This thesis investigates the prospects of some different superconducting mixers integrated with planar antennas for the millimeter and submillimeter regime. Two kinds of Superconductor/Insulator/Superconductor (SIS) tunnel junctions for use in mixers have been fabricated; Nb/PbBi edge junctions and Nb trilayer junctions. READ MORE

  5. 5. Enhancing Tropospheric Humidity Data Records from Satellite Microwave and Radiosonde Sensors

    University dissertation from Chalmers University of Technology

    Author : Isaac Moradi; Chalmers tekniska högskola.; Chalmers University of Technology.; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; remote sensing; water vapor; microwave; radiosonde; climate; CDR; homogenization; radio-frequency; antenna; humidity; troposphere; meteorology;

    Abstract : Water vapor is the most dominant greenhouse gas and plays a critical role in the climate by regulating the Earth's radiation budget and hydrological cycle. A comprehensive dataset is required to describe the temporal and spatial distribution of water vapor, evaluate the performance of climate and weather prediction models in terms of simulating tropospheric humidity, and understand the role of water vapor and its feedback in the climate system. READ MORE