Mehmood, Arshad (2018)
Dielectric Resonator Antenna and Array Concepts based on Glass, Ceramics and Glass-ceramics.
Technische Universität Darmstadt
Dissertation, Erstveröffentlichung
Kurzbeschreibung (Abstract)
The focus of this work has been the exploration of different concepts of the dielectric resonator antennas. Mainly, a new kind of glass-ceramic material was characterized and used for making different dielectric loaded or dielectric resonator antennas and corresponding arrays based on such radiating elements. The measurements were carried out on different glass-ceramic compositions and showed a permittivity ranging from 21 to 38 with Qf product in the range from 1500 to 10000 GHz. Patch antennas for the GPS band using glass-ceramic loading were successfully fabricated and tested. The transparent property of the non-ceramized glass was used for making transparent antennas in combination with a solar-cell module for future energy-autonomous units. Its functionality was demonstrated with a measured gain of 4 dB. Another novel concept of tilted beam dielectric resonator antenna was also successfully tested. The beam was measured to be tilted at 30◦ from the broadside. The prototype was manufactured by using commonly available alumina substrate material and cutting it with laser, thus providing an easy fabrication method. The tilted dielectric resonator antenna element has also been used to fabricate fixed beam arrays at 0◦, 30◦ and 60◦ beams. This proved the concept of using the tilted beam dielectric resonator antennas for better lower elevation angle coverage. Another major part of the work was concerned with realizing the phased arrays with dielectric resonator antennas as radiating elements. Two phased array demonstrators were fabricated in 1 × 4 configuration. One of the array consisted of liquid crystal based delay lines in inverted microstrip technology. It was fabricated with 10 GHz target frequency and successfully showed steering of the beams in −25◦ and +25◦. The second array was based on Barium Strontium Titanate phase shifters in the metal-insulator-metal configuration. This array used stacked dielectric resonator antennas for a wide bandwidth at center frequency of 8 GHz and showed beam steering of −30◦ and +30◦.
| Typ des Eintrags: | Dissertation | ||||
|---|---|---|---|---|---|
| Erschienen: | 2018 | ||||
| Autor(en): | Mehmood, Arshad | ||||
| Art des Eintrags: | Erstveröffentlichung | ||||
| Titel: | Dielectric Resonator Antenna and Array Concepts based on Glass, Ceramics and Glass-ceramics | ||||
| Sprache: | Englisch | ||||
| Referenten: | Jakoby, Prof. Rolf ; Solbach, Prof. Klaus | ||||
| Publikationsjahr: | 2018 | ||||
| Ort: | Darmstadt | ||||
| Datum der mündlichen Prüfung: | 23 Juni 2017 | ||||
| URL / URN: | http://tuprints.ulb.tu-darmstadt.de/7503 | ||||
| Kurzbeschreibung (Abstract): | The focus of this work has been the exploration of different concepts of the dielectric resonator antennas. Mainly, a new kind of glass-ceramic material was characterized and used for making different dielectric loaded or dielectric resonator antennas and corresponding arrays based on such radiating elements. The measurements were carried out on different glass-ceramic compositions and showed a permittivity ranging from 21 to 38 with Qf product in the range from 1500 to 10000 GHz. Patch antennas for the GPS band using glass-ceramic loading were successfully fabricated and tested. The transparent property of the non-ceramized glass was used for making transparent antennas in combination with a solar-cell module for future energy-autonomous units. Its functionality was demonstrated with a measured gain of 4 dB. Another novel concept of tilted beam dielectric resonator antenna was also successfully tested. The beam was measured to be tilted at 30◦ from the broadside. The prototype was manufactured by using commonly available alumina substrate material and cutting it with laser, thus providing an easy fabrication method. The tilted dielectric resonator antenna element has also been used to fabricate fixed beam arrays at 0◦, 30◦ and 60◦ beams. This proved the concept of using the tilted beam dielectric resonator antennas for better lower elevation angle coverage. Another major part of the work was concerned with realizing the phased arrays with dielectric resonator antennas as radiating elements. Two phased array demonstrators were fabricated in 1 × 4 configuration. One of the array consisted of liquid crystal based delay lines in inverted microstrip technology. It was fabricated with 10 GHz target frequency and successfully showed steering of the beams in −25◦ and +25◦. The second array was based on Barium Strontium Titanate phase shifters in the metal-insulator-metal configuration. This array used stacked dielectric resonator antennas for a wide bandwidth at center frequency of 8 GHz and showed beam steering of −30◦ and +30◦. |
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| URN: | urn:nbn:de:tuda-tuprints-75034 | ||||
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 000 Allgemeines, Informatik, Informationswissenschaft > 004 Informatik | ||||
| Fachbereich(e)/-gebiet(e): | 18 Fachbereich Elektrotechnik und Informationstechnik 18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Mikrowellentechnik und Photonik (IMP) > Mikrowellentechnik 18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Mikrowellentechnik und Photonik (IMP) |
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| Hinterlegungsdatum: | 24 Jun 2018 19:55 | ||||
| Letzte Änderung: | 24 Jun 2018 19:55 | ||||
| PPN: | |||||
| Referenten: | Jakoby, Prof. Rolf ; Solbach, Prof. Klaus | ||||
| Datum der mündlichen Prüfung / Verteidigung / mdl. Prüfung: | 23 Juni 2017 | ||||
| Export: | |||||
| Suche nach Titel in: | TUfind oder in Google | ||||
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