| Title |
Plačiajuosčių mikrobangų jutiklių kūrimas, tyrimas ir taikymas / |
| Translation of Title |
Development, research and application of wide band resistive sensors. |
| Authors |
Ragulis, Paulius |
| Full Text |
|
| Pages |
114 |
| Keywords [eng] |
Resistive sensor ; microwave pulse measurement ; double ridged waveguide |
| Abstract [eng] |
The main goal of the thesis was the development of a resistive sensor, a sensing element of which made from n-type Si is mounted in a double ridge waveguide. Developed sensor was devoted for the measurement of high power microwave pulses. The sensor should meet the following requirements: its resistance should be lower than 1 k, a voltage standing wave ratio has been set < 1.5, and the frequency response of the sensor should be as flat as possible. In the thesis the results of theoretical calculation of electromagnetic fields inside waveguide segment with the sensing element of the resistive sensor mounted in the standard double ridged waveguides WRD250 and WRD840 are presented. Calculations have been performed using finite-difference time-domain method. The dimensions and specific resistance of the sensing element from the modeling results were chosen for the sensor that meets the requirements mentioned above. Corresponding sensors have been manufactured and their characteristics have been investigated experimentally. The sensitivity dependence on frequency, output signal dependence on microwave pulse power and voltage standing wave ratio were determined. Connecting the sensor to a wide band horn antenna the microwave pulse power density (electric field strength) in free space was measured. Resistive sensors were used for electric field strength measurement in the immunity against microwave radiation tests on internet routers and media converters demonstrating possible application of the resistive sensors. |
| Type |
Doctoral thesis |
| Language |
Lithuanian |
| Publication date |
2013 |
