It is regarded generally according to VLF theory that the capacitance of T model multiple tuned VLF antenna will increase pro rata by the number of antenna groups

five or six groups are adopted usually.We analysed the equivalent capacitance and inductance by the metrical reactance of T model VLF single tuned VLF antenna and multiple tuned VLF antenna

and studyed the relationship of its' equivalent capacitance

inductance

power capacity to its' frequency and antenna groups.The result shows that the capacity of each antenna group decreases gradually if the number of T model multiple tuned VLF antenna groups are overabundance

in fact the effect is limited to improve the power capacity and bandwidth when the antenna groups are more than three

it is an important guidance in the design of T model VLF multiple tuned transmit antenna.