Type Acitve Antennas Module External Active Antenna Module Dual Shark Antenna Module TDMB Shark Antenna Module Active Antenna Module / Specifications Part No. Patch Size[mm] Frequency [MHz] LNA Gain[dB] Noise [dB] Polarization V.S.W.R GPS SAL-2.8GA301 25x25x3 1575.42±1.023 12/15/18/20/23 0.8~1.8 RHCP 2.0:1 [Max] GPS SAL-2.8GB301 20x20x3 1575.42±1.023 12/15/18/20/23 0.8~1.8 RHCP 2.0:1 [Max] GPS SAL-2.8GC301 18x18x3 1575.42±1.023 12/15/18/20/23 0.8~1.8 RHCP 2.0:1 [Max] SDMB SAL-2.8SF301 25x13x3 2642 12/15/18/20/23 1.0~1.8 RHCP LHCP 2.0:1 [Max] SAL-2.8SF401 25x13x3 2642 12/15/18/20/23 1.0~1.8 RHCP LHCP 2.0:1 [Max]