GLIDE-PATH BEACON (VERSIONS) Russian patent published in 2011 - IPC G01S1/16 

FIELD: radio engineering.

SUBSTANCE: versions of glide-path beacon (GPB) are intended to provide instrument aircraft approach to aerodromes with high-level snow cover and terrain compartments in aircraft approach zone, which cause interference of radio waves in glide path zone, without snow removal or compaction in front of GPB. At that, it is not required to retune GPB during transition from summer to winter season and vice versa. GPB includes antenna array of N radiating elements of summary channel and antenna array of 2N radiating elements of difference channel (N lower and N upper ones), which are located symmetrically relative to radiating elements of summary channel at distance ±d, where λ - wave length; θ_GL - specified glide path angle, and amplitudes of currents in radiators of summary channel have been chosen from condition of attenuation of radiation of radio waves towards terrain compartments.

EFFECT: improving stability of angle of glide path and steepness of zone of glide-path beacon at change of height of underlying surface or during the change of properties of underlying surface.

3 cl, 13 dwg