Microwave Breakdown in Antennas

Annonsmanus / Advertisement manuscript Forms 8733DA3F false false false /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Normal tabell"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} table.MsoTableGrid {mso-style-name:Tabellrutnät; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; border:solid windowtext 1.0pt; mso-border-alt:solid windowtext .5pt; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-border-insideh:.5pt solid windowtext; mso-border-insidev:.5pt solid windowtext; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; tab-stops:65.2pt; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} Work description With increasing RF transmitter power in space systems, problems with microwave breakdown can occur in antennas.During the depressurization in the launch phase, corona would be the potential problem, and then multipaction (resonant secondary emission) can occur in the vacuum of outer space. Design guidelines exist for simple geometries, but these are ill-adapted to real antenna structures.Therefore, there is a need to investigate corona and multipaction for the antenna types we use at Saab Space. The thesis project comprises a literature study, theoretical analysis, design and construction of a measurement system, measurements, and analysis of the results. Qualifications The thesis is a 20 week commitment for one or two students.Starting time is as soon as possible, decided in collaboration with the student. Relevant education is either electrical engineering or engineering physics. For more information, please contact: Last date for applications 2008-06-30 Saab Space Saab Space utvecklar och tillverkar högkvalificerad utrustning för användning i rymden. Apply for this vacancy