5 GHz Wi-Fi 6 (802.11ax) Front-End Module with Integrated DPD Coupler

The SKY85791-11 is a highly integrated, 5 GHz front-end module (FEM) incorporating a single-pole, double-throw (SPDT) transmit/receive (T/R) switch, a low-noise amplifier (LNA) with bypass, and a power amplifier (PA) intended for 802.11ax applications and systems. The PA output includes a coupler to allow for digital pre-distortion (DPD) in applications. In DPD applications, the coupler is also used in place of the power detector.

An integrated logarithmic power detector is included to provide closed-loop power control within the system.

The device is provided in a compact, 16-pin, 3.0 x 3.0 mm Quad Flat No-Lead (QFN) package.

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Frequency (GHz) Min.5.15
Frequency (GHz) Max.5.925
802.11 WLAN Standardax
Antenna Ports1
Architecture5 GHz Wi-Fi 6 (802.11ax) Front-End Module with Integrated DPD Coupler
PackageQFN, 16-pin
Package (mm)3 x 3 x 0.85


  • Integrated 802.11ax 5 GHz 1024 QAM, PA, LNA with bypass, and T/R switch
  • Fully-matched input and output
  • Integrated logarithmic power detector and directional coupler
  • Transmit gain: 32 dB
  • Receive gain: 16 dB
  • Output power:
    • MCS11, 17 dBm, -43 dB DEVM
    • MCS9, 22 dBm, -35 dB DEVM
  • Small QFN (16-pin, 3.0 x 3.0 mm) package (MSL3, 260 °C per JEDEC J-STD-020)

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