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http://hdl.handle.net/10012/7027
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| Title: | Design of a Power Amplifier and Envelope Amplifier for a Multi-band Multi-standard Envelope Tracking System |
| Authors: | Hu, Yushi |
| Approved Date: | 26-Sep-2012 |
| Date Submitted: | 2012 |
| Abstract: | This thesis presents the design of a Power Amplifier (PA) and envelope amplifier for an Envelope
Tracking (ET) system that is aimed at meeting emerging radio standards in terms of power efficiency
and linearity. The class J mode of operation, as well as the efficiency and power contours from load
pull was exploited to develop an adequate procedure for the design of a broadband and high
efficiency radio frequency PA. An in-depth study has also been conducted for a hybrid envelope
amplifier topology in order to optimize it for power efficiency through proper setting of its switching
stage supply. Two separate proof of concept prototypes of the PA and envelop amplifier were
designed, fabricated and tested. The PA designed was able to achieve an average drain efficiency of
73.6%, average output power of 45.89dBm, and an average gain of 18dB between 650MHz and
1.050GHz (48% bandwidth). The envelope amplifier achieved close to 74.6% efficiency for a 5MHz
bandwidth LTE signal envelope with 6.4dB peak to average power ratio. |
| Program: | Electrical and Computer Engineering |
| Department: | Electrical and Computer Engineering |
| Degree: | Master of Applied Science |
| URI: | http://hdl.handle.net/10012/7027 |
| Appears in Collections: | Faculty of Engineering Theses and Dissertations
Electronic Theses and Dissertations (UW)
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