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Transceiver targets 60GHz multi-Gb wireless comm

Posted: 25 Feb 2013 ?? ?Print Version ?Bookmark and Share

Keywords:transceiver? radio architecture? smartphone? tablet? CMOS?

Imec has teamed up with Panasonic Corp. to reveal a 60GHz radio transceiver chipset with low power consumption. In addition to delivering high data rates over short distances, Imec drastically boosted the link budget of the system by introducing beamforming into the radio architecture. The multi-Gb chipset also paves the way towards small size, low-power, low-cost solutions for battery-operated consumer devices including smartphones and tablets, they added.

The prototype chipset consists of a receiver and a transmitter chip that are based on a direct conversion architecture combined with an on-chip phased-array architecture. This makes it suited for implementation in 40nm low-power digital CMOS technology targeting low-cost, mass market production, the companies noted. The receiver and transmitter chips are implemented for four antenna paths, but they are easily extendible to more antenna paths thanks to the beamforming at analogue baseband, rather than at RF.

The chip size is kept low through the use of lumped components even at 60GHz, and very compact mm-wave CMOS layout techniques. The transmitter chip consumes 584mW and the receiver chip 400mW at 1.1V power supply. The chipset is integrated with a four antenna array in a compact module and demonstrated in a wireless link. With QPSK modulation, a data rate of 2.31Gb/s is obtained, and with QAM16 modulation, a data rate of 4.62Gb/s is achieved. No bit errors were found when transmitting packets of 32,768 symbols over a distance of 3.6m with QPSK modulation and 0.7m with QAM16 modulation. Thanks to the beamforming a 3dB scan angle range around 120 is achieved with 11dBi antenna gain.

The receiver and transmitter chips are designed for the IEEE802.11ad standard. The receiver and transmitter chipset has been tested with IEEE 802.11ad PHY/MAC baseband chip developed by Panasonic, demonstrating the complete system for IEEE 802.11 applications.

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