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  4. Design of CMOS Low Power Mixer and Power Combining Power Amplifier
 
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Design of CMOS Low Power Mixer and Power Combining Power Amplifier

Date Issued
2009
Date
2009
Author(s)
Wang, Che-Yu
URI
http://ntur.lib.ntu.edu.tw//handle/246246/188314
Abstract
In recent years along with the wireless communication industry vigorous development, the microwave frequency band already drew close in saturated. In order to pursue a wider frequency band to achieve the faster transmission speed and the high data capacity transmission, the broadband millimeter wave frequency band provides the solution for this question. The millimeter wave wireless communication system provides the wide bandwidth. In order to achieve the high conformability, the high efficiency, and the low cost circuit design. We used the CMOS technology to complete this circuit design.n recent years, the short distance high speed wireless transmission system in the mobile device becomes tendency. There are more and more strict requirements for the power consumption of this kind product. Therefore, how to design a low power consumption mixer becomes an important challenge. For pursuing the higher transmission speed, besides expansion baseband frequency, we using a more complex modulation technology to promote the transmission quantity are a direction, too. In order to deal with a more complex modulation, the high linearity mixer becomes the bottleneck in the design. Therefore how to design a high linearity mixer becomes an important challenge.he thesis subject is using CMOS technology to design and to realize various types microwave and the millimeter wave mixers. The research is focus on the construction realization about low power consumption and the linearity enhancement method. The paper mainly may divide into three parts. The first part describes a mixer with a low power consumption design. Starting from the traditional Gilbert-cell mixer to discuss at first, and then introduce the merit of the bulk pumped local oscillation signal mixer construction. Finally we realize the chip from Taiwan Semiconductor Manufacturing Company’s 0.13 micrometer CMOS technology. The simulated result is agreed to the measured result. It may confirms that this kind of construction may succeed realizes in a millimeter-wave band. The second part describes the high linearity mixer design, starts from the linearity construction discussion, then completes the Gilbert-cell mixer design at first, ant then insert the linearizer to increase the linearity. After adding the linearizer, the linearity of the mixer improved largely. Therefore, adding linearizer in the low power consumption mixer to promote the linearity, then achieved the low power consumes and high linearity demand.oreover, in the radio frequency transceiver, the power amplifier often needs the high biasing voltage to achieve the large output power. Therefore we need to provide an extra bias voltage to supply the power amplifier. In the thesis, we design a low voltage power amplifier. In order to compensate the low voltage operation produced insufficient output power. The power combine method can be used to increase the output power. Therefore we had designed an eight-way power combiner transformer. Finally, we realize the chip from Taiwan Semiconductor Manufacturing Company’s 0.13 micrometer CMOS technology. This PA has 38 to 44GHz 3-dB bandwidth and a 17.2dBm output. Its may conform the general system voltage specification for 1.5V bias.
Subjects
mixer
low power
linearity
power amplifier
Type
thesis
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ntu-98-R96942064-1.pdf

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