Today, the advances in Complementary MetalOxideSemiconductor (CMOS)
technology have guided the progress in the wireless communications circuits and
systems area. Various new communication standards have been developed to accommodate
a variety of applications at different frequency bands, such as cellular
communications at 900 and 1800 MHz, global positioning system (GPS) at 1.2 and
1.5 GHz, and Bluetooth andWiFi at 2.4 and 5.2 GHz, respectively. The modern wireless
technology is now motivated by the global trend of developing multi-band/multistandard
terminals for low-cost and multifunction transceivers. Exploring the unused
10-66 GHz frequency spectrum for high data rate communication is also another trend
in the wireless industry.
In this dissertation, the challenges and solutions for designing a multi-band/multistandard
mobile device is addressed from system-level analysis to circuit implementation.
A systematic system-level design methodology for block-level budgeting is
proposed. The system-level design methodology focuses on minimizing the power
consumption of the overall receiver. Then, a novel millimeter-wave dual-band receiver
front-end architecture is developed to operate at 24 and 31 GHz. The receiver
relies on a newly introduced concept of harmonic selection that helps to reduce the complexity of the dual-band receiver. Wideband circuit techniques for millimeterwave
frequencies are also investigated and new bandwidth extension techniques are
proposed for the dual-band 24/31 GHz receiver. These new techniques are applied
for the low noise amplifier and millimeter-wave mixer resulting in the widest reported
operating bandwidth in K-band, while consuming less power consumption.
Additionally, various receiver building blocks, such as a low noise amplifier with
reconfigurable input matching network for multi-band receivers, and a low drop-out
regulator with high power supply rejection are analyzed and proposed. The low
noise amplifier presents the first one with continuously reconfigurable input matching
network, while achieving a noise figure comparable to the wideband techniques. The
low drop-out regulator presented the first one with high power supply rejection in the
mega-hertz frequency range.
All the proposed building blocks and architecture in this dissertation are implemented
using the existing silicon-based technologies, and resulted in several publications
in IEEE Journals and Conferences.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/ETD-TAMU-2010-05-7842 |
| Date | 2010 May 1900 |
| Creators | El-Nozahi, Mohamed A. |
| Contributors | Entesari, Kamran, Sanchez-Sinencio, Edgar |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | thesis, text |
| Format | application/pdf |
Page generated in 0.0085 seconds