RF Electronics ♦ news digest
based phones will be produced this year,” said Neil Shah, an analyst from research firm Strategy Analytics. “Virtually all 3G and 4G capable phones incorporate 2G access technology, and 2G remains the dominant wireless communication technology in many areas of the world.”
Shipping in volume since January 2012, TriQuint’s TQM6M9069 QUANTUM Tx module features the same small 5 x 6 mm footprint, making it one of the smallest 3G/4G transmit modules on the market. This new part simplifies mobile device design and includes a GSM/GPRS power amplifier and WCDMA antenna switch. TriQuint plans to expand the QUANTUM Tx module family in the months ahead with product solutions that incorporate additional switch ports to support more frequency bands.
The QUANTUM Tx transmit modules implement TriQuint’s proprietary CuFlip technology to replace wire bonds with copper bumps. This saves board space and enables superior system performance by eliminating noise-radiating wires. The copper bumps also dissipate heat better than traditional interconnect techniques. The QUANTUM Tx modules offer improved system efficiency and full RF transmit functionality in a compact 30 mm² package.
(RF3235) high linearity UMTS transmit/receive ports. These also serve as GSM Rx ports and are pin-to-pin compatible.
Both devices are built on RFMD’s PowerStar integrated power control technology, SOI (silicon- on-insulator) switch technology, and integrated transmit filtering.
These devices are designed for use as the final portion of the transmitter section in a GSM850/ EGSM900/DCS1800/PCS1900/UMTS handset and eliminate the need for a PA-to-antenna switch module-matching network. The 50 Ω matched input and output ports require no external matching components and no external DC blocking on TRx ports.
Quad-band modules enhance performance
The RF3235 and 3237 are GSM/GPRS transmit modules employ RFMD’s gallium arsenide HBT and silicon CMOS technology
The company says that when paired with one or more discrete 3G power amplifiers such as RF722x or RF724x, the devices enable best-in-class performance at the lowest total solution cost for 3G entry platforms.
Both modules incorporate four (RF3237) to six
The modules have a high efficiency at rated output power (POUT) and operate at a 3.5 V (VBATT).
For GSM850/EGSM900 applications, efficiency is 43%, while for DCS1800/PCS1900, it is 36%.
Isolation for most port combinations is greater than 35 dB and the TRx insertion loss for low band is 0.6 db and 0.8 db for high band applications. This boosts 3G efficiency and Rx sensitivity.
The devices are suited for single through quad- band UMTS handsets and connected devices including TDSCDMA and CDMA. The GPRS class 12 compliant modules can also be incorporated in
March 2012
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