Investigation and Design of Low Phase Noise and Wideband Microwave VCOs

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dc.contributor.authorZheng, Minhu
dc.contributor.departmentChalmers tekniska högskola / Institutionen för mikroteknologi och nanovetenskapsv
dc.contributor.departmentChalmers University of Technology / Department of Microtechnology and Nanoscienceen
dc.date.accessioned2019-07-03T13:10:23Z
dc.date.available2019-07-03T13:10:23Z
dc.date.issued2013
dc.description.abstractThis thesis studied the design techniques of low phase noise and wideband microwave voltage controlled oscillators (VCOs) used for point-to-point radio applications. First, basic oscillator theories as well as different technologies were reviewed. Then two Cband MMIC VCOs were designed in a commercial InGaP HBT foundry process with different topologies, namely the balanced Colpitts and the balanced Clapp. The circuits were simulated with a commercial harmonic balance simulator and the designs were optimized for the best phase noise performance by studying the implication of various design parameters, such as tank quality factors, transistor current density, feedback capacitor ratio and etc. Simulation results show over 10% tuning range for both topologies and a phase noise of -122 dBc/Hz at 100 kHz offset for the balanced Clapp, 10 dB superior to that of the balanced Colpitts, owing to a higher current excitation.
dc.identifier.urihttps://hdl.handle.net/20.500.12380/177897
dc.language.isoeng
dc.setspec.uppsokPhysicsChemistryMaths
dc.subjectInformations- och kommunikationsteknik
dc.subjectElektroteknik och elektronik
dc.subjectInformation & Communication Technology
dc.subjectElectrical Engineering, Electronic Engineering, Information Engineering
dc.titleInvestigation and Design of Low Phase Noise and Wideband Microwave VCOs
dc.type.degreeExamensarbete för masterexamensv
dc.type.degreeMaster Thesisen
dc.type.uppsokH
local.programmeWireless, photonics and space engineering (MPWPS), MSc
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