The 403CP20 is a light, medium performance circularly polarized antenna. Optimum match and gain are between 398 & 408 MHz for the satellite band. Computer design techniques help keep spurious side lobes low down for optimum signal to noise ratios. This antenna features the same CNC machined, O-ring and silicone-gel sealed, driven element assemblies common to all M2 Yagi antennas. This insures years of trouble free performance regardless of weather.