A 5.8GHz integrated CMOS transmitter for Chinese electronic toll collection system

A fully integrated direct up-conversion transmitter for Chinese electronic toll collection system (ETCS) is presented in a 0.18um CMOS process. Improved isolation between power amplifier (PA) and voltage-control oscillator (VCO) is achieved by configuring the VCO frequency to be 2/3 transmission frequency. A 5.8GHz mixer with an automatic amplitude control (AAC) loop is proposed to obtain better amplitude shift keying (ASK) performance. The occupied bandwidth of the transmitter is optimized by digital filtering. A high-linearity ASK modulator translates the base-band signal to carrier frequency and a two-stage class-A and class-AB PA is adopted to obtain sufficient efficiency and relatively high linearity. The transmitter consumes only 99mW with 1.8V supply voltage to meet the low-power demand of Chinese ETCS and carries a single-ended 3.2dBm output power. Under 1.024Mbps data rate, the eye-opening is better than 91% and the transmitter achieves -58.2dBc adjacent channel power ratio (ACPR) and 1.46MHz occupied bandwidth.

[1]  Sung-Mo Kang,et al.  0.18um CMOS integrated chipset for 5.8GHz DSRC systems with +10dBm output power , 2008, 2008 IEEE International Symposium on Circuits and Systems.

[2]  T. Masuda,et al.  Single-chip 5.8 GHz ETC transceiver IC with PLL and demodulation circuits using SiGe HBT/CMOS , 2002, 2002 IEEE International Solid-State Circuits Conference. Digest of Technical Papers (Cat. No.02CH37315).

[3]  Shintaro Shinjo,et al.  CS-2-7 ASK and Pi/4-QPSK Dual Mode SiGe-MMIC Transceiver for 5.8GHz DSRC Terminals having Stabilized Amplifier Chain , 2008, IMS 2008.

[4]  Asad A. Abidi,et al.  Low-power radio-frequency ICs for portable communications , 1995, Proc. IEEE.

[5]  Kuduck Kwon,et al.  A 5.8 GHz Integrated CMOS Dedicated Short Range Communication Transceiver for the Korea/Japan Electronic Toll Collection System , 2010 .

[6]  K. Mori,et al.  5.8GHz ETC SiGe-MMIC Transceiver having Improved PA-VCO Isolation with Thin Silicon Substrate , 2006, 2006 IEEE MTT-S International Microwave Symposium Digest.

[7]  M. Abe,et al.  Single-chip 5.8GHz DSRC transceiver with dual-mode of ASK and Pi/4-QPSK , 2008, 2008 IEEE Radio and Wireless Symposium.

[8]  R. Meyer.  Low-power monolithic RF peak detector analysis , 1995, IEEE J. Solid State Circuits.

[9]  M. Nagata,et al.  5.8 GHz RF Transceiver LSI Including On-Chip Matching Circuits , 2006, 2006 Bipolar/BiCMOS Circuits and Technology Meeting.