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Design and Fabrication of RFID Front END Transceiver single chip with 2.5W Output Power

Javidan, Javad | 2010

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 40915 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Atarodi, Mojtaba
  7. Abstract:
  8. This thesis deals with the front-End of an Integrated RFID Reader operated in 860MHz to 960MHz, which integrates a RF transceiver including PA, LNA and Mixer. In the receiver part, a power amplifier was fabricated and measured and in the transmitter part, LNA and Mixer were designed. There is a growing interest in utilizing CMOS technologies for RF power amplifiers (PAs). Although several advances have been made recently to enable full integration of PAs in CMOS, it is still among the most difficult challenges in achieving a truly single-chip radio system in CMOS. This is exacerbated by supply voltage reduction due to CMOS technology scaling and on-chip passive losses due to the conductive substrate used in deep submicron CMOS processes. A new transformer combining architecture, which is suitable in designing highly efficient PAs in CMOS processes, is proposed to address this issue. Proposed transformer network is used for PAs with several transformers. New optimization method was proposed to achieve high efficiency and minimum area. The design has been taped out in 0.18um CMOS and the measured characteristics have validated our concept. For RFID Reader, there are two distinct operation modes: listen mode and talk mode. The distinctive features of RFID systems are analyzed, system and building block specifications are derived based on the EPCglobal Gen-2 standard. It is revealed that key challenges in implementing the RFID reader are self-interference caused by simultaneous transmitting and receiving at the same carrier frequency, as well as reconfigurability for multi-protocol operation. The key idea of the design is utilizing feedback in order to cancel out the interferer.
  9. Keywords:
  10. Mixer ; Radio Frequency Identification (RFID) ; Radio Frequency Identification (RFID) Reader ; Class AB Amplifier ; Low Noise Amplifier (LNA) ; Power Combiner ; Transformer Network Optimization

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