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Telecoms ♦ news digest


for mmWave design kits that enable customers to design and simulate mmWave circuits and products.


In addition, TowerJazz will bring its pure-play specialty wafer foundry approach to the program through MPW runs to allow select, early access to the technology.


“It is exciting to work with DARPA on the use of gratings and trim exposures. Our team has demonstrated abilities to print sub-90nm features with very good depth of focus, and we are applying these methods to our SiGe BiCMOS technologies. We look forward to demonstrating novel capabilities and offering these technologies to our customers through our MPW infrastructure,” said David Howard, TowerJazz Executive Director and Primary Investigator for GRATE.


Avago provides WiMAX coexistence FEM to simplify mobile electronics


The highly-integrated, small-footprint module is claimed to be the first to deliver coexistence operation of WiMAX with other cellular and WiFi radios in the same device.


Avago Technologies, a supplier of analogue interface components for communications, industrial and consumer applications, is releasing a complete RF front-end module (FEM) for WiMAX radios in mobile handset or portable PC applications.


The new AFEM-S257 module is designed specifically for coexistence operation of WiMAX with other cellular and WiFi radios in the same device. The module features two receive ports and a single transmit port in a small 5 by 7 by 1 mm package that is ideal for space-constrained mobile applications in the 2.5 to 2.7 GHz frequency range – providing up to 25 % space savings over discrete WiMAX solutions.


The AFEM-S257 module integrates multiple high-performance technologies to reduce PCB board footprint, while simplifying design and manufacturing and shortening time to market. Using Avago’s 0.25-µm GaAs enhancement-mode pHEMT process and Film Bulk Acoustic Resonator (FBAR) filtering technologies, the module delivers superior performance across voltage and temperature levels.


FBAR technology delivers steep roll-off and low insertion loss, resulting in extended battery life and talk time and better signal quality. With high noise rejection of 35 dBc, the module enables fewer interference issues between IEEE 802.16 WiMAX and other radios. The AFEM-S257 module achieves 24 dBm of WiMAX-compliant output power, while maintaining an error vector magnitude (EVM) of 2.5 % at 16 quadrature amplitude modulation (QAM).


“The AFEM-S257 front-end module provides a complete, compact solution that can be easily and quickly designed in to mobile WiMAX applications, which is demonstrated in the top three reference designs addressing this market,” said James Wilson, senior director of marketing for wireless products at Avago. “With Avago FBAR filtering technology delivering unparalleled out-of-band rejection, the module offers the performance major smartphone makers demand.”


The AFEM-S257 has 18 % power added efficiency (PAE) and all RF ports are matched to 50 Wfor simplified design. With 3 to 5V power supply for TX path the TX gain is 34 dB. The NF is 3.5 dB from ANT to RX and has 25 dB of TX/RX isolation and RX1/RX2 isolation.


The AFEM-S257 WiMAX coexistence FEM is available in a 28-lead MCOB package and is priced at $9.50 each in 10,000 piece quantities. Samples and production quantities are available now through


October 2011 www.compoundsemiconductor.net 85


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