Designing and Fabricating the Active Phase Shifter

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asoodeh, Alireza | 2010

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 40483 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Atarodi, Mojtaba
Abstract:
In this project, issues related to designing and fabricating active phase shifter blocks on the silicon substrate have been examined. Phase shifter circuits are designed in a way that have the most bandwidth and the less sensitivity to process characteristics changes and environmental conditions. The purpose of this research, is designing an active 6 bits phase shifter. The active phase shifter synthesizes the required phase using a phase interpolation process by adding quadrature phased input signals. It uses a new quadrature all-pass filter for quadrature signaling with a wide bandwidth. Also substitute structure has been suggested to this filter which is the main block in determining bandwidth of all system and it provides the possibility of increasing number of bit in an extensive bandwidth. All of the designed circuits have been implemented in the 0.18 µm CMOS technology. Also all of the necessary stages for measuring different circuit’s characteristics have been provided. The results of the measurement show a suitable adaptation between constructed chip and results of simulation; and they confirm practicality of the used method in this project.
Keywords:
Complementary Metal Oxide Semiconductor Technology (CMOS) ; Phased Array Antenna ; Phase Shifter Circuit ; 90 Degree Filter Block

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