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RF/Microwave??

5.8GHz transmitter meets China e-toll standard

Posted: 23 Jan 2009 ?? ?Print Version ?Bookmark and Share

Keywords:transmitter 5.8GHz? China electronic toll standard? microcontroller?

RF Micro Devices Inc. has unveiled that it claims to be the first fully integrated 5.8GHz transmitter to comply with China's electronic toll collection (ETC) standard: "GB/T 20851.1-2007: Electronic Toll CollectionDedicated Short Range Communication (DSRC) Part 1: Physical Layer."

The ML5830 is a low-power, amplitude shift key (ASK) and frequency shift key (FSK) transmitter operating in the 5.8GHz ISM band. It is designed for electronic toll collection applications, including on board units and road side units.

With the implementation of RFMD's FastWave microcontroller technology, the ML5830 eliminates the cumbersome mass production tuning process necessary with competing solutions. FastWave enhances performance through self-alignment of the voltage-controller oscillator (VCO), filtering and PLL detection and control. FastWave also enables user-specific application configurations through modifications via a three-wire serial interface to transmitter control, calibration and interface algorithms.

The ML5830 consumes less than 36mA current consumption while delivering +4dBm of output power. The device has a fully integrated digital FIR transmit data filter that limits occupied bandwidth. In addition it offers three-wire serial control interface and integrated power regulation enabling 2.7- to 3.6V operation

The ML5830 integrates an upconversion mixer, a buffer/pre-driver amplifier and an ASK modulator capable of producing a typical output power of +4dBm. The ML5830's design provides designers ease-of-implementation and a minimal external BOM count as well as improved time-to-market for OEMs. The ML5830's FSK mode provides digitally selectable data rates of 1- and 2Mbit/s. The ML5830 also incorporates a fully integrated fractional-N synthesizer, a VCO and the necessary filtering to digitally switch to a higher power, higher data rate FSK modulation mode, providing OEMs the flexibility to meet both current and future needs of the ETC market.

Alastair Upton, general manager of RFMD's broadband and consumer business unit, said, "As the industry's first fully integrated 5.8GHz transmitter to comply with China's ETC standard, the ML5830 significantly accelerates time-to-market for OEMs while allowing RFMD to participate in a growing market segment for wireless data. Also, with the implementation of our proprietary FastWave microcontroller technology, the ML5830 delivers incremental benefits to designers and OEMs in time savings and simplified design."

"After testing and evaluating the ML5830, we have concluded that its features and functions do comply to the DSRC products according to Chinese National Standard, and do meet China ETC National Standard requirements," said Huang Wei-Ming of Guangzhou ITS Communications Equipment Co. Ltd. "Our company is in the process of designing in the ML5830 and we target to commence mass production with our end product in May 2009."

The ML5830 is priced at $5 each in quantities of 10,000 units and is packaged in a 6mm x 6mm x 1mm, 40-pin QFN package. Samples and pre-production quantities are available immediately, and volume production is expected to commence in the June 2009 quarter.





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