LOW-FREQUENCY UNDERGROUND ANTENNA Russian patent published in 2011 - IPC H01Q1/04 

FIELD: radio engineering.

SUBSTANCE: low-frequency underground antenna consists of two pairs of inclined conductors 1 installed in inclined wells 2 drilled parallel to slopes of earth highland 3, vertical conductor 4 installed in vertical well 5. Lower end of vertical conductor 4 is connected to the first terminal of radio transmitter 7. Lower ends of inclined conductors 1 are connected by means of additional conductors 11 to the second terminal of radio transmitter 7. Inclined wells 2 are drilled in pairs in two orthogonal planes. Antenna is provided with additional drilling chambers 10 in order to simplify the drilling of inclined wells 2 and arrangement of inclined conductors in them 1.

EFFECT: higher efficiency and lower economic costs of antenna installation.

2 cl, 6 dwg