L1 GPS GLONASS Passive Antenna. The M1516HCT-P-SMA is a dual band, high performance antenna designed for both GPS and GLONASS, and built on Maxtena proprietary Helicore® technology. This technology provides exceptional pattern control, polarization purity and high efficiency in a very compact form factor. The M1516HCT-P-SMA is a screw-on design, featuring an integrated SMA connector. The ultra light design is rated IP-67 when mounted for added protection. This product is ideal for applications requiring high quality reception of both GPS and GLONASS signals.