Dissertation
Fully integrated SiGe microwave phased-array receivers for satellite communications
Doctor of Philosophy (PhD), Washington State University
01/2013
Handle:
https://hdl.handle.net/2376/108042
Abstract
This dissertation is dedicated to presenting various designs and analysis for RF phase shifting architectures to implement microwave phased-arrays receivers in commercial SiGe process. Three design examples in X-band, L/S/C/X band, and K-band, are demonstrated.
An X-band 8-channel SiGe PIN diode phased-array receiver for 9.5-11.5 GHz applications has been proposed and fabricated in a commercial 0.18-µm SiGe BiCMOS process. The receiver consists of low noise amplifiers (LNA), 3-bit variable gain amplifiers (VGA), 3-bit passive phase shifters and 4:1 active combiners. High performance PIN diode switches used in phase shifters ensure low phase error. The bridged-T type phase shifter with center-tap inductor is analyzed using an equivalent-circuit model to obtain analytical form of component values. The receiver achieves over 10 dB measured average gain, less than 5 dB NF (@max. gain and ref. phase state) per channel. The RMS gain error is less than 0.67 dB and the RMS phase error is less than 5° with VGA control at 9.5-11.5 GHz for all phase states.
For the second implementation, an ultra-wide band 8-channel L/S/C/X band phased-array receiver is presented, which includes LNAs, 4-bit VGA, and 4-bit active phase shifters. Shunt feedback LNAs are adopted in order to achieve wideband amplification. Differential structures are used for VGAs and phase shifters to reduce ground parasitics. In order to achieve wide band operation, vector modulator is adopted for the phase shifter compared with passive one. The receiver achieves 10.2 GHz 3 dB bandwidth, which is from 1.1 GHz to 11.3 GHz, one decade frequency bandwidth.
The final implementation is a 4-channel K-band phased-array receiver using deep silicon via (DSV) technology to reduce ground parasitic. A new phase shifter structure by using floating body technique to reduce insertion loss, and using parasitic resonant frequency eliminate technique to increase bandwidth is proposed. Simulated results show less than 4.1° RMS phase error and less than 1.3 dB RMS gain error is achieved over 30% fractional bandwidth. The one channel can achieve 18.2 dB gain, 2.82 dB NF, and -8.5 dBm output P1dB at 20 GHz with 45 mW power consumption.
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Details
- Title
- Fully integrated SiGe microwave phased-array receivers for satellite communications
- Creators
- YU You
- Contributors
- Deukhyoun Heo (Advisor)Partha Pratim Pande (Committee Member)Benjamin Belzer (Committee Member)
- Awarding Institution
- Washington State University
- Academic Unit
- Electrical Engineering and Computer Science, School of
- Theses and Dissertations
- Doctor of Philosophy (PhD), Washington State University
- Number of pages
- 88
- Identifiers
- 99900581447301842
- Language
- English
- Resource Type
- Dissertation