Analysis of antenna radiation characteristics in mine tunnels

This paper analyses the radiation characteristics of LCX and helical antennas at 900MHz and 2.4GHz band in mine tunnels. The radiation fields of LCX and helical antenna in far-field were calculated and analyzed. The result shows: LCX presents more uniform field distribution than that of the helical antennas; the radiated field from LCX with zigzag slots is more uniform and have wider frequency band than that of LCX with inclined slots; the LCX with zigzag slots is more suitable for mine mobile communications and field coverage underground blind zone.