Monolithic-Microwave Integrated-Circuit Design of Quadrature Modulator for Wireless Communications
| Autor: | Jian-Ming Wu, 吳建銘 |
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| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 88 This thesis researchs the design of quadrature modulator consists of 120MHz quadrature modulator that is fabricated using hybrid elements and print circuit board (PCB) technology for digital signal generator and quadrature modulator monolithic-microwave integrated-circuit (MMIC) that is fabricated using GaAs heterojunction bipolar transistor (HBT) technology for Personal Communication Service (PCS) applications. The 120MHz quadrature modulator incorporates power divider/combiner, phase shifter and doubly balanced mixer; the design architecture, principle and measurement results of division are presented in this thesis. A quadrature modulator is implemented by combining every division and measures specifications accurately, comparing with that of Agilent ESG-D series digital signal generator with the same carrier frequency and digital modulation. The quadrature modulator MMIC for PCS applications incorporates phase shifter, Gilbert cell mixer, differential to single-ended converter and RF amplifier at output; the design architecture, principle and simulation results of division are presented in this thesis. A quadrature modulator is integrated by combining every division and simulates parameters strictly.For troublesome specification measurement of quadrature modulator, this thesis also presents measurement method and instrument setup detailedly. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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