The L54113 from Mercury Systems is a GPS/GNSS Filter Amplifier with Frequency 1217.6 to 1237.6 MHz / 1565.4 to 1585.4 MHz, Noise Figure 2.5 dB, Attenuation/Rejection 40 dBc, Current 0.04 A, Gain 19 to 29 dB. Tags: Module with Connector. More details for L54113 can be seen below.