20 February 2012

RFMD launches quad-band GSM/GPRS Tx modules with UMTS transmit/receive ports

RF Micro Devices Inc of Greensboro, NC, USA says that its new RF3235 and RF3237 quad-band GSM/GPRS Class 12-compliant transmit modules, paired with one or more discrete 3G power amplifiers (PAs) such as those from the RF722x or RF724x series, enable what is claimed to be best-in-class performance at the lowest total solution cost for 3G entry platforms.

The new modules include four (RF3237) to six (RF3235) high-linearity UMTS transmit/receive (TRx) ports that also serve as GSM Rx ports and are pin-to-pin compatible. Both build on RFMD’s PowerStar integrated power control technology, SOI (silicon-on-insulator) switch technology, and integrated transmit filtering.

The 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. 50Ω matched input and output ports require no external matching components (with no external DC blocking needed on TRx ports).

TRx insertion loss is 0.6db (low band) and 0.8dB (high band), boosting 3G efficiency and improving Rx sensitivity. Efficiency at the rated output power (POUT) is 43% (GSM850/EGSM900) and 36% (DCS1800/PCS1900) at a supply voltage (VBATT) of 3.5V. Isolation is >35dB for most port combinations.

Applications include single- through quad-band UMTS handsets and connected devices including TDSCDMA and CDMA, GSM850/EGSM900/DCS1800/PCS1900 products, 3V multi-mode mobile applications, and GPRS Class 12 compliant devices.

The new products are now available in production quantities. Pricing for begins at $2.70 for the RF3235 and $2.47 for the RF3237, each in 100-unit quantities.

Tags: RFMD Quad-band GSM/GPRS Tx modules

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