This research aims to design and implement GaAs HBT MMICs for the two crucial components in W-CDMA transmitters, quadrature modulator and upconverter, with thorough evaluation of the package and PCB effects. To construct a strong theoretical foundation, the small-signal modeling of HBTs and the EM-characterization of package and PCB interconnects are intensively studied. In this dissertation, a novel extrinsic-inductance independent approach is developed for direct extraction of the intrinsic elements in a hybrid-pi equivalent circuit of HBTs. The interconnects of leadless RFIC packages and test PCBs are investigated using the 3-D EM simulation tools and transformed into the equivalent circuits for co-analysis with the designed HBT MMICs. The first HBT MMIC design is a W-CDMA direct-conversion quadrature modulator incorporating a new 90 degrees phase shifter. Although the proposed 90 degrees phase shifter has a remarkable advantage over the others in implementation loss, it is rather susceptible to the package and PCB effects, resulting in a moderate degradation of EVM. The second HBT MMIC design is a W-CDMA upconverter incorporating a popular micromixer. Although the micromixer-based upconverter consumes much less current at low output powers to achieve the same high linearity when compared to a Gilbert mixer-based design, it is quite susceptible to the package and PCB effects, causing a significant degradation in ACPR. Comparison between theory and measurement shows good agreement in evaluating the influences of package and PCB interconnects on both HBT MMICs.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0608106-233419 |
| Date | 08 June 2006 |
| Creators | Wu, Jian-Ming |
| Contributors | Tian-Wei Huang, Chin-Chun Meng, Sheng-Fuh Chang, Tzyy-Sheng Horng, Huey-Ru Chuang, Shey-Shi Lu, Chih-Wen Kuo, Kin-Lu Wong, Ken-Huang Lin |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0608106-233419 |
| Rights | unrestricted, Copyright information available at source archive |
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