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Design and Implementation of a 15 dBm CMOS Power Amplifier

Kalantari Mahmoud Abadai, Milad | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42586 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Medi, Ali
  7. Abstract:
  8. Today, phased array antennas have important role in wireless communication systems. Utilizing optimum channel capacity, having better signal to noise ratio and, high data rate are the most important features of these systems. These systems are composed of several thousands of separated transceivers which provide possibility of directional electromagnetic radiation by changing the phase and the amplitude of the signal in each transceiver independently. So, the main components of such a system are amplifiers, phase shifters and, amplitude controllers. Also a high resolution phased array military radar system is another vital applications of these systems at frequency band of 9-10 GHz. The building blocks of these radars (T/R modules) were traditionally fabricated by means of various GaAs integrated circuits (such as amplifiers, phase shifters, attenuators and SPDT switches) on a PCB. This process needs to make sure that all components are working properly, for each T/R module after mounting components on the PCB. In addition it is very hard and expensive to calibrate, troubleshoot and repair the overal system. On the other hand, due to strategic problems, it is not easy to obtain the III-V compound integrated circuits (such as GaAs) for military applications in our country. the main purpose of this work is to design and implement a medium power amplifier using 0.18-um CMOS technology for above system which can easily be integrated with phase shifters, attenuators and, digital circuits on a single chip (SoC). By using the new chip production costs have been decresed and yeild has been increased. Also, complexity of calibration and maintainance will be much lower
  9. Keywords:
  10. Phased Array Antenna ; Complementary Metal Oxide Semiconductor Technology (CMOS) ; Radars ; Phase Shifter Circuit ; Attenuation ; Medium Power Amplifier

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