Design and implementation of an integrated switched-oscillator impulse generator
| dc.contributor.author | Mohammadzamani, Samira | |
| dc.contributor.examiningcommittee | Mojabi, Puyan (Electrical and Computer Engineering) Swatek, David (Electrical and Computer Engineering) | en_US |
| dc.contributor.supervisor | Behzad, Kordi (Electrical and computer Engineering) | en_US |
| dc.date.accessioned | 2019-09-10T19:06:25Z | |
| dc.date.available | 2019-09-10T19:06:25Z | |
| dc.date.issued | 2019-08-26 | en_US |
| dc.date.submitted | 2019-08-26T20:34:42Z | en |
| dc.degree.discipline | Electrical and Computer Engineering | en_US |
| dc.degree.level | Master of Science (M.Sc.) | en_US |
| dc.description.abstract | In this thesis, an integrated impulse generator has been designed, simulated, fabricated and tested. The switched-oscillator topology has been used as the impulse generator. A switched oscillator consists of a low impedance transmission line, which charges through a DC source with a large input impedance. The transmission line is connected to a high speed switch at one end and a high feed point impedance antenna at the other end. After charging the transmission line, closing the fast switch short circuits the transmission line, resulting a transient wave propagating toward the antenna. The high mismatch between transmission line characteristic impedance and antenna feed point impedance causes a big reflection at the antenna terminal. Due to the short circuit at switch terminal, the reflected signal will reflect back at the switch terminal as well. These back and forth reflections generates a series of pulses at the antenna terminal which will transmit by the antenna. Switched oscillators are used to generate high power electromagnetic signals in high power microwave applications. A time domain simulation as well as the sensitivity analysis have been done in this thesis to find the most important design parameters. Three prototype switched oscillator has been designed and fabricated. The first prototype consists of a gas discharge tube as switch, a coaxial cable, and a monopole antenna. In the second prototype, a gas discharge tube as switch, a microstrip transmission line, and a printed circuit board monopole antenna is used. In the third prototype, a conductor-backed coplanar waveguide is used instead of microstrip transmission line. The switched oscillator impulse generator is designed to operate in the industrial, scientific and medical (ISM) radio frequency band with purpose of being part of the interrogation system of a passive, wireless electric field sensor. An impulse generator with the resonance frequency of 915 MHz and bandwidth of 10 MHz has been designed and fabricated in this project. | en_US |
| dc.description.note | October 2019 | en_US |
| dc.identifier.uri | http://hdl.handle.net/1993/34195 | |
| dc.language.iso | eng | en_US |
| dc.rights | open access | en_US |
| dc.subject | Switched Oscillator, Impulse generator | en_US |
| dc.title | Design and implementation of an integrated switched-oscillator impulse generator | en_US |
| dc.type | master thesis | en_US |