RU36572U1 - Antenna De-icer - Google Patents

Description

The utility model relates to radio engineering, in particular to antenna technology. and can be used to protect antennas from adverse climatic conditions (snow, ice).

Known anti-icing antenna system designed to prevent the accumulation of snow and ice formation, containing a reflector, in the lower part of which, making up a third of the entire surface of the reflector, heating elements are installed (AM Pokras, AM Somov, GG TDurikov. Antennas for satellite earth stations Communications, Moscow, Radio and Communications. 1985, S.-47 - 48).

The disadvantages of the known anti-icing system are:

- uneven distribution of the thermal field over the area of the mirror, leading to mechanical stresses in the aigenne at the heat-cold interface;

- Significantly high level of heat loss during heat transfer from the dusty side of the antenna to the mirror surface.

Known reflector containing a reflective layer and located behind it a heating element. The heating element is heating wires or films that pass along the entire reflective surface (s. Germany JVo 3718319, 1/02, RJ World Invention, issue 31, No. 7.1989, s.-10).

The disadvantages of this technical solution are:

-condition of the need for the coefficient of thermal expansion for the material of the heating film or heating wires to match the material of the power shell;

- since the heating wire has a linear coil with a heated shell, the discreteness of the thermal field is inevitable.

The inventive utility model allows to increase the efficiency of the anti-icing device due to the uniform distribution of the thermal field, which is provided by a resistive layer located uniformly throughout the antenna mirror and which is an integral part of the radio-reflecting shell.

This is achieved by the fact that in the anti-icing device of the antenna. it contains a reflector with a radio-reflective sheath and a heating element, the wadding element is made in the form of a resistive layer of woven carbon material and is located inside the radio-reflective sheath over its entire area, current outputs are pressed into the resistive layer to connect an electric current source with a given voltage.

The implementation of the heating element in the form of a resistive layer of woven carbon material allows to ensure the reliability of long-term operation of the antenna due to the stable electrical characteristics of the woven carbon material and the possibility of its cutting taking into account any configuration of the heating surface.

The location of the resistive layer inside the radio-reflective shell allows you to provide profiles directly to the radio-reflective surface of the antenna mirror, as well as protect the resistive layer from external

weather factors, and the location of the resistive layer over the entire area of the radio-reflective sheath provides uniformity of heating of the entire radio-reflective surface of the antenna.

Pressing in a resistive layer of current leads for connecting a source of electric current with a given voltage provides a case of electrical protection of one-piece contact (not shown in the drawing) during operation in various climatic conditions.

The essence of the design of the anti-icing device of the antenna is illustrated in the drawing.

The antireflective antenna device contains a reflector consisting of a radio-reflecting 1 and 5 power shells interconnected by a honeycomb core 4, a resistive layer 2 inside the radio-shielding shell 1 with current leads 3 pressed into it.

The reflector is made by gluing through a honeycomb core 4 two preformed shells of radio-reflecting 1 and power 5 that are preformed on special mandrels. The resistive layer 2 of the woven carbon material of the TO-15 gypsum is laid inside the radio-protecting shell 1 and: fiberglass based on fiberglass type T-13 and an epoxy binder at the stage of layer-by-layer lay-out of the radio-reflecting shell 1. During heat treatment under pressure, the resistive layer 2 and electrical contacts (not shown) from a brass grid with current outputs 3 and A copper wire in a sheath made of a fluoroplastic tape and a fiberglass wire is pressed into the radio-reflective sheath 1. Moreover, the resistive layer of woven carbon material does not affect the thermal properties of the material of the reflector.

Anti-icing device operates as follows.

The power supply from any source of electric current with a voltage of 12 to 220 V was supplied via current leads 3 through pressed contacts (not shown in the drawing) to a resistive layer 2 located uniformly throughout the area of the radio-reflecting sheath 1, providing tsmostabilizing effect on the antenna.

The nominal specific power is 600 W / m, which allows you to create a temperature sufficient for melting ice and snow. The honeycomb core 4 located between the radio-reflecting 1 and power 5 shells, being a structural element, performs the functions of a heat insulator, reducing heat loss from the back of the antenna (power shell).

Turning the de-icing device on and off was performed manually, so weather monitoring is necessary when the winter season sets in. The de-icing device can operate at any minimum temperature and does not require close observation and care.

The implementation of the de-icing device in accordance with the claimed utility model 1 shows the effectiveness of the anti-icing system to ensure uniformity of the temperature field over the entire radio-reflecting surface.

Head of b / d Borodin Patent Division

Authors: 2: N.P. Kalinin

from

A.A. Lokhov B.V. Nikulin S.G. Sukhov

Claims (1)

Antifreeze device for the antenna, comprising a reflector with a radio-reflective sheath and a heating element, characterized in that the heating element is made in the form of a resistive layer of woven carbon material and is located inside the radio-reflective sheath over its entire area, while current leads are pressed into the resistive layer to connect an electric current source with a given voltage.