8802

8163

كارشناسي ارشد

مخابرات

اصفهان: دانشگاه صنعتي اصفهان، دانشكده برق و كامپيوتر

1392

هشت،86ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

رضا صفيان

غلامرضا عسگري

13/2/93

زيدآبادي نژاد

مهندسي برق و كامپيوتر

ID8163

87 Construction of a spatial power combiner at X frequency Morteza Ahmadzade Date of Submission 2014 01 04 Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor Dr Reza SafianAbstractBroadband microwave power amplifiers are one of the most important military and communicationsystems Power and high efficiency broadband high linearity characteristics low noise and long life arethe most important issues in the design of amplifiers Solid state devices and vacuum tubes are limitationsto provide this feature By using spatial power combining can overcome this limitation Spatial combinationunlike the circuit usual combining which limits efficiency bandwidth and heat transfer is a coherentmethod for combining multiple pieces of solid state using free space within a waveguide structure In the first chapter of this project the microwave and millimeter wave technology and applications in theareas of commercial and military are presented and then the characteristics of solid state devices andvacuum tubes and areas working they considered and finally various methods of power combining and itscharacteristics were studied In the second chapter definitions and parameters are used to evaluate the combiners will be discussed andthen in chapter three first we do an analysis about the Power combiners and the different designs ofwaveguide microwave power combiners in the frequency bands of X will analysis And after that theprocesses of combiner construction in terms of bandwidth are investigated Finally in chapter four wesummarized and concluded Keywords Spatial power combiner Broadband power combiner radial and rectangular waveguide

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