UNDERGROUND ANTENNA Russian patent published in 2013 - IPC H01Q21/00 

FIELD: radio engineering.

SUBSTANCE: underground antenna (UA) may be used as a receiving or a transmitting antenna in a short-wave (SW) or an ultrashort-wave (USW) ranges. UA comprises a flat element (FE) in the form of orthogonal pairs of flat radiators (FR) 1, arranged in a coplanar manner within a semiconducting environment (SCE) with macroscopic parameters ε_r1 and σ₁. External ends of the FR 1 are electrically connected with the help of shorting short circuit conductors 2. Adjacent ends of each pair of the FR 1 with the help of sections of a coaxial cable are connected to feeder tracks. In the SCE there is a pit arranged, on the bottom of which there is a metal screen MS installed additionally. The FE is fixed horizontally above the MS at the height h₁. The pit volume between parallel planes of MS and FE is filled with soil with macroscopic parameters ε_r2 and σ₂, and the pit volume between planes of the FE and the SCE interface with air is filled by soil with macroscopic parameters ε_r3 and σ₃, besides, sections of coaxial cables are installed vertically between planes of FE and MS.

EFFECT: its higher efficiency and reduced impact of variations of macroscopic parameters of UA installation at its efficiency.

6 cl, 4 dwg