MPA-182-C 18mm L1 GPS Passive Microstrip Antennas Maxtena MPA-182-C 18mm L1 GPS Passive Microstrip Antennas are 18mm ceramic GPS passive patch antennas based on Maxtena technology. Maxtena MPA-182-C 18mm patch antennas are perfect for projects with a smaller scope and budget for which high-performance and lower weight are not primary factors. The MPA-182-C features higher upper hemisphere efficiency and a lower axial ratio as compared to regular patch antennas. These antennas are designed for embedded applications, such as GPS handheld units, mobile devices, and tracking devices.