Sky5® GNSS L1 + L5 Dual-Frequency Low-Noise Amplifier Front-End Module with Post-Filter

The SKY55951-11 front-end module (FEM) features an integrated L1 low-noise amplifier (LNA) and post-filter along with an L5 LNA and post-filter designed for Global Navigation Satellite System (GNSS) receiver applications.

Part of our Sky5® portfolio, the SKY55951-11 provides high gain, low current consumption, and integrated input and output matching for both L1 and L5, all in a compact 2.0 x 1.6 mm package.

The L1 path also features an integrated B13 notch filter, providing excellent suppression (-50 dBm) of cellular low-band 2nd harmonic signals impacting GPS L1 reception. The post-filtering on the L5 path also provides high (> 45 dBc) out-of-band rejection for interference below 1 GHz.

The SKY55951-11 uses surface-mount technology (SMT) in a Multi-Chip Module (MCM), a proven and highly manufacturable solution.

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Frequency (MHz)1559-1606
Test Frequency (MHz)1575
DescriptionSky5® GNSS L1 + L5 Dual-Frequency Low-Noise Amplifier Front-End Module with Post-Filter
Gain (dB)17
VDD (V)1.5-3.3
IP1 dB (dBm)
NF (dB)1.4
PackageMCM, 20-pin
Package (mm)2.0 x 1.6 x 0.7


  • Dedicated L1 and L5 receive paths
  • Small signal gain: 17 dB typical
  • Low current consumption: L1 = 1 mA, L5 = 1.9 mA @ 1.8 V
  • Integrated input and output matching on L1 and L5 paths
  • Integrated B13 notch on L1 path
  • Single, wide DC supply range: 1.5 to 3.3 V
  • Small MCM (20-pin, 2.0 x 1.6 x 0.7 [nominal] mm) package (MSL3, 260 °C per JEDEC J-STD-020)

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