A multimode, power-adjustable transmitter for UHF mobile RFID reader

  • Authors:

  • Tongqiang Gao;Haigang Yang;Zhihua Wang

  • Affiliations:

  • Institute of Electronics, Chinese Academy of Sciences, Beijing, China 100190;Institute of Electronics, Chinese Academy of Sciences, Beijing, China 100190;Institute of Microelectronics, Tsinghua University, Beijing, China

  • Venue:
  • Analog Integrated Circuits and Signal Processing
  • Year:
  • 2011

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Abstract

Aiming at the expansive application of RFID technology, design considerations are expatiated to a highly-integrated, multimode, power-adjustable transmitter in mobile UHF RFID reader with CMOS process. The transmitter consists of digital, baseband and RF sections, including an up-conversion mixer and a gain-variable power amplifier (PA). Multiple data modes can be generated in digital section. The direct-conversion RF section is proposed to minimize the off-chip components and provide a low-cost, highly efficient solution. The highlight of the paper is the PA can achieve a maximum output power of 26 dBm and maintain a power-added efficiency (PAE) higher than 40% over the 18---26 dBm power range. Feasibility of the transmitter is validated by ADS simulator.