RF front end portfolio to cover modem-to-antenna for 600 MHz bands

October 17, 2017 // By Jean-Pierre Joosting
New additions to the RF Front-End (RFFE) portfolio from Qualcomm Technologies, Inc., are designed to allow original equipment manufacturers (OEMs) to rapidly build mobile devices that support new operator deployments of Band 71, a 600 MHz low-frequency band.

This prime spectrum brings greater capacity to mobile operators’ networks, in addition to enhanced outdoor coverage and indoor penetration. The modem-to-antenna suite is expected to enable a wide variety of devices, including smartphones and Internet of Things (IoT) products, to access this spectrum without adding unnecessary complexities to device design and development.

T-Mobile is currently deploying network capabilities and Qualcomm® Snapdragon™ Mobile Platform based smartphones supporting 600 MHz Band 71 are commercially available.

The new 600 MHz modem-to-antenna system comprises a suite of RF front end components, including:

  • QPM2622 low-band power amplifier module (PAMiD) – which comes with integrated duplexers, switches and an antenna coupler, and complements the QPM2632 mid-band PAMiD and the QPM2642 high-band PAMiD, for global SKU development.
  • QAT3516 adaptive aperture tuner – this claims to be the first commercially announced aperture tuner optimized for 600 MHz, and comes with adaptive tunability and can be paired with the QAT3550 antenna impedance tuner for advanced adaptive tuning capabilities.
  • 600 MHz duplexer B1223 and diversity receive (DRX) filter B8356 – the high-Q temperature compensated filters (HQTCF) process provides optimized performance and the innovative filter design topologies enable challenging specifications including high bandwidth support, low insertion loss and high attenuation to be achieved.
  • Extension of support for 600 MHz band B71 in previously announced multimode GaAs power amplifiers QPA4360, QPA4361 and QPA5461.


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