The Design of Software-defined Radio Transmitter and Dual-band Power Amplifier
Date Issued
2010
Date
2010
Author(s)
Huang, Ting-Yun
Abstract
Because of the skyrocketed popularity of mobile communication device, more and more communication standards are introduced, making engineers busy designing equipments applied to distinct standards. Many researchers have devoted to the area of system-on-chip(SoC) and software-defined radio anticipating a appreciate solution to reduce the chip area as well as absorb most of components into a single device.
In this thesis, the feature of traditional Cartesian and polar transmitter are discussed. For the application of software-defined radio, the Cartesian transmitter using radio frequency digital to analog converter(RFDAC) has higher power efficiency than those using DAC and mixer. And it can drive the RF power amplifier directly with the maximum output power of -2dBm.
Besides, two methods, dual-band output matching and impendence switching, are proposed to design a dual- band power amplifier. The dual-band PA demonstrates gain of 15dB at 2.45GHz and 14dB at 5.2GHz. In application, multi-standard device using dual-band PA can utilize chip area more efficiently.
Subjects
System-on-chip
software-defined radio
Cartesian transmitter
polar transmitter
radio frequency digital to analog converter
Type
thesis
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