The ANT1021 from RFM Integrated Device is a GPS/GNSS Antenna with Frequency 1575.42 MHz (GPS) / 1602 MHz (GLONASS), Gain -9.8 dBi (GPS) / -5.3 dBi (GLONASS), Impedance 50 Ohms, Bandwidth 18 MHz, Return Loss -10 dB. Tags: Patch, Ceramic, PCB. More details for ANT1021 can be seen below.