The GNSS-503 from NovAtel is a GPS/GNSS Antenna with Frequency Upper passband: 1577.5 ± 32.5 MHz, Lower passband: 1232.0 ± 68.0 MHz, Gain 1 to 4 dBic, Noise Figure 2.5 dB, Voltage 3.3 to 18 V, Current 20 mA. Tags: Low Profile. More details for GNSS-503 can be seen below.