The 1227AT45A0042 from Johanson Technology is a GPS/GNSS Antenna with Frequency 1206 to 1249 MHz, Gain -3.8 to -2.2 dBi (Avg), 2.8 to 5.1 dBi (Peak), Power 3 W, Impedance 50 Ohms, Return Loss 9.5 dB. Tags: Chip, Ceramic. More details for 1227AT45A0042 can be seen below.