The 1227AT45A0042 from Johanson Technology is a Antenna with Frequency 1227.6 to 21 MHz, 1206 to 1249 (+10MHz guard band), Gain -2.0 to 1 dBi, Power 3 W, Operating Temperature -40 to 85 Degree C. Tags: Chip, Ceramic. More details for 1227AT45A0042 can be seen below.