APAKM2507S-SGL5 GPS L1 + L5 Stacked Patch Antenna Abracon APAKM2507S-SGL5 GPS L1 + L5 Stacked Patch Antenna features low VSWR, RHCP polarization, and a gain of dBi (L1), -3.0dBi (L5). The unit has a frequency range of 1575.42±1.023 L1 and 1176.45±1.023 L5. Abracon APAKM2507S-SGL5 GPS L1 + L5 Stacked Patch Antenna applications include IoT, M2M, remote technology/monitoring, geofencing, and navigation.