Kadevi Engineering Company [P] Limited manufactures Helical Ultra High Frequency - UHF Antenna. Kadevi Engineering Company [P] Limited holds ISO 9001:2008 certifications. Kadevi Engineering Company [P] Limited supplies steel sections, fabrication of towers & structures, hot dip galvanizing, fasteners & generators. Helical Ultra High Frequency - UHF Antenna is used for line of sight communication. Helical Ultra High Frequency - UHF Antenna are available in the frequency range of 300 MHz to 1000 Mhz. These antennas are used for trans-receive.