Kadevi Engineering Company [P] Limited supplies Ground Plane Very High Frequency - VHF Antenna. Kadevi Engineering Company [P] Limited has received ISO 9001:2008 certifications. Kadevi Engineering Company [P] Limited supplies steel sections, fabrication of towers & structures, hot dip galvanizing, fasteners & generators. Ground Plane Very High Frequency - VHF Antenna is available in 30 Mhz to 300 Mhz frequency range. Ground Plane Very High Frequency - VHF Antenna is capable of providing coverage up to 160 km. These antennas are used for line of sight communication. The antennas are vertically polarized for omnidirectional radiation and horizontally polarized for directional radiation requirements.