2.090.020 ARK-15M

2.090.020 Loop Antenna Unit Overview

The 2.090.020 loop antenna unit is a key component of the ARK-15M automatic radio compass used in aircraft navigation systems. The unit is designed for receiving radio signals from ground-based beacons and broadcast stations. It operates as part of the onboard radio direction finding system, ensuring stable signal acquisition for further processing in the receiver.

2.090.020 Antenna Operating Principle

The antenna unit is based on a non-rotating loop antenna design consisting of two mutually perpendicular loops. This configuration eliminates moving parts and increases system reliability. The antenna forms a directional reception pattern in the shape of a figure-eight, allowing determination of the relative bearing to the radio source based on signal strength variation.

2.090.020 Aviation Applications

The unit is used in aircraft and helicopter navigation systems equipped with the ARK-15M radio compass. It is widely installed on platforms such as Mi-8 and Mi-17 helicopters, as well as various fixed-wing aircraft. Within the system, the antenna provides primary signal reception required for accurate radio navigation and bearing indication.

2.090.020 Installation Context

The antenna unit is installed externally on the aircraft fuselage, typically in the lower section, under a radio-transparent radome for protection against environmental effects. It operates in conjunction with the receiver unit, antenna matching device, and control panel. The product is also known under alternative designations 2.090.020, which refer to the same antenna unit.

Product Type: Loop antenna unit (direction finding antenna)
Application / Where Used: ARK-15M airborne radio compass system
Function: Reception of radio signals and determination of bearing direction
Antenna Type: Non-rotating loop antenna (dual-loop configuration)
Radiation Pattern: Figure-eight directional pattern
Installation: External fuselage mounting under radome
System Components: operates with receiver unit 2.003.006-01, matching unit 2.240.000, control panel 3.624.049
Technical Documentation: ARK-15M system documentation

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