In this thesis, some most popular technologies for both resonator and active device were presented and compared. Two MMIC VCOs were selected to design on InGaP HBT and push push configuration with different topologies, namely balanced Colpitts and balanced Clapp. Optimization factors which give significant contribution to lower phase noise were investigated, such as Q factor, current density, bias circuitry, feedback capacitor ratio and etc. The optimum simulation results were obtained in the end of this work, which have the lowest phase noise such as -119.6 ~ -122.2 dBc/Hz (f0) with more than 16% tuning range and -108.7 ~ -111.2 dBc/Hz (f0) with 10% tuning range at 100 kHz offset frequency, respectively. The results were also analyzed by the formula of FOMT, which were -191.01 dBc/Hz and -182.48 dBc/Hz, respectively. The phase noise performance can reach the state of the art level and indicate potential applications.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:liu-81934 |
| Date | January 2012 |
| Creators | Zhang, Nayuan |
| Publisher | Linköpings universitet, Institutionen för teknik och naturvetenskap, Linköpings universitet, Tekniska högskolan |
| Source Sets | DiVA Archive at Upsalla University |
| Language | English |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
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