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EETE FEB 2016

design & products Wireless communications Four-antenna path beamforming CMOS transceiver supports up to 4.62Gbps At last IEEE International Solid-State Circuits Conference (ISSCC2016), nanoelectronics research center imec and Vrije Universiteit Brussel (VUB) presented a four-antenna path beamforming transceiver for 60GHz multi Gb/s communication in 28nm CMOS technology. The transceiver is a breakthrough in developing a small, low-cost, and low power solution for multi-gigabit communication targeting WiGig as well as 60GHz wireless backhaul applications. Imec’s and VUB’s 60GHz transceiver architecture features direct conversion and analog baseband beamforming with four antennas. The researchers say the architecture is inherently simple and is not affected by image frequency interference. A 24GHz phase-locked loop that sub-harmonically locks a 60GHz quadrature oscillator is inherently immune to the pulling disturbance of the 60GHz power amplifier, they add. The prototype transceiver chip, only 7.9sqmm is implemented in 28nm CMOS and integrates a four-antenna array. The chip was validated with a IEEE 802.11ad standard wireless link of 1m. The transmitter consumes 670mW and the receiver 431mW at 0.9V power supply. The transmitter-to-receiver EVM was better than -20dB in all the four WiGig frequency channels (58.32, 60.48, 62.64 and 64.8 GHz), with a transmitter equivalent isotropic radiated power (EIRP) of 24dBm. This allows for QPSK as well as 16QAM modulations according to the IEEE 802.11ad standard, achieving very high data rates up to 4.62 Gbps. imec www.imec.be 55x20x3.5mm dev module packs LoRa, WiFi and Bluetooth Pycom’s second project on Kickstarter, LoPy is a WiFi, Bluetooth and LoRa (Low Power WAN) enabled module supporting 10x faster programming with MicroPython scripting. Developed as a follow-up project from Pycom’s original WiPy Kickstarter feedback (where 60% of backers expressed their preference for a new WiFi and Bluetooth module and 20% for a new WiFi and LoRa module), the LoPy not only has all three, but it also doubles up as a LoRa Nano Gateway, able to connect up to 100 other LoPys in a 5km radius. The Amsterdam-based startup has formed partnerships with LoRa network operators like Senet and ThingsNetwork to give LoPy users the best possible network coverage. LoPy uses MicroPython’s open source scripting language to reduce microcontroller coding time, greatly decreasing the time to market for connected products. The company will make available ready to use coding templates all editable with the Pymakr IDE to be launched in March. The multiple radios allow the LoPy to bridge data across a smartphone and the LoRa network. Pycom www.pycom.io Highly stable and flexible SAR testing for wireless devices The MT8820C Radio Communication Analyzer from Anritsu Corporation now integrates with both DASY6 and cSAR3D from Schmid & Partner Engineering AG (SPEAG) to provide seamless Specific Absorption Rate (SAR) compliance testing that significantly reduces assessment costs and maximizes flexibility. The measurement of RF exposure, expressed in terms of SAR, is a mandatory testing requirement in many countries, bringing with it a need for cost effective, accurate and reliable testing that reduces time to market. DASY6 is the latest generation of the industry-leading dosimetric and nearfield evaluation system. It is fully compliant with all international standards and national regulations for SAR measurement. Compared to DASY52, DASY6 includes powerful new features resulting in a significant time savings for routine SAR compliance testing. This is achieved without sacrificing accuracy by combining robot-optimized movements, intelligent scanning and smart utilization of standardized test reduction techniques. The integration of the MT8820C Radio Communication Analyzer improves the efficiency of user handling to save even more time during the certification process. To improve measurement speed, cSAR3D uses state-of-the-art fast data acquisition, advanced 3D field reconstruction algorithms, and tight integration of the Anritsu MT8820C Radio Communication Analyzer. cSAR3D is designed for testing compliance with national and international exposure guidelines. It is compliant with the latest draft of IEC 62209-3 and it uses fast SAR protocols defined in IEC 62209-2 and IEEE 1528. cSAR3D integrates with DASY6 for the optimum combination of speed, versatility and regulatory acceptance. The MT8820C One-Box Tester is a multi-format 2G, 3G, and LTE tester with capability for UE calibration, RF parametric testing, and functional testing, including call processing or no-call based testing. Supported formats include LTE-A, LTE, W-CDMA/HSPA CDMA2K up to 1xEV-DO Rev. A, TD-SCDMA/HSPA, and GSM/GPRS/EGPRS. The MT8820C provides the most stable and most widely proven implementation of cellular standards for base station emulation and RF TRX testing. SPEAG www.speag.com 36 Electronic Engineering Times Europe February 2016 www.electronics-eetimes.com


EETE FEB 2016
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