Pre-amplifiers Home / What We Do / Airborne Antenna / RF Components / Pre-amplifiers A pre-amplifier amplifies the signals in the specified frequency range while rejecting spurious signals outside the range using incorporated filtering. Pre-amplifiers also incorporate a limiter circuit for high power protection. Solution Finder products 7-554 Type 7-554 Series Dual Frequency GPS Antenna Electronic Unit (5V) L1 / L2 Bands Read More 7-551 Type 7-551 Series Dual Frequency GPS Antenna Electronic Unit Read More Read More Read More