WO2002093995A1 - Compound used to protect against electromagnetic radiation formed by three layers of resin - Google Patents

Abstract

The invention relates to a compound which is used in buildings to protect against electromagnetic radiation and which is formed by three layers of resin. The layers of resin are applied directly to the surface to be protected in liquid phase and said layers solidify following the application thereof. The first layer comprises a primer epoxy resin of 0.4 mm in thickness. The second layer comprises a conductive resin of 0.5 mm in thickness containing NiCu with a relative conductivity of 0.8. The third layer is 0.5 mm in thickness and comprises an epoxy resin that protects against degradation and corrosion. The inventive compound is either applied directly to the surface to be protected or a galvanised steel plate with 50 % Fe and a thickness of 1 mm is placed between the surface and the compound. Said compound is used as a coating for protecting buildings, roofs, surfaces close to radiation sources and interiors.

Description

PROTECTIVE COMPOUND OF THE ELECTROMAGNETIC RADIACTION IN BUILDINGS

FORMED BY THREE RESIN CAPS

As far as technical field is concerned, TELE-SHíELD is applicable to wireless radio-electric Telecommunications.

It should be noted from its background that TELE SHEELD was born as a result of the massive implementation of wireless telecommunication networks (eg mobile telephony) and the consequent massive installation of transmitting / receiving stations (antennas) in urban environments.

The Electromagnetic Fields generated by some of these emission sources can disturb the proper functioning of electronic and computer equipment, since they induce higher Electric Field levels for which these equipment are designed.

Likewise, people who are exposed more directly and close to these sources of emission are under a certain level of social alarm due to the existing uncertainty about the effects of exposure of electric fields of a certain intensity on human health.

• The TELE-SHIELD system allows to reduce the intensity of exposure levels of electric fields, generated by radio wave sources and micro-waves between IfcHz and ITHz frequency, such as: mobile phone antennas of various technologies (0.9 GHz, 1.8GHz, ...), commercial radio stations, radars, etc. , which have an impact on people and electronic equipment that are located under, or in front of or in areas adjacent to said emitting sources permanently and in a direct exposure area.

• With the use of TELE SBDELD, the intensity of the direct exposure electric field will be reduced in levels of i GdB, so that, for example, a house located under the direct exposure area at a distance of 6 meters from a transmitting antenna / GSM mobile phone receiver of 1000 Watts of transmitting power, operating at 0.9Ghz frequency, located on the roof of the same building, will receive a maximum electric field exposure of 3.5 V / m, instead of the 10V7m that it will receive without the installation of

SUBSTITUTE SHEET (RULE 26) TELE SHIELD.

• TELE SHD ± LD is effective for any source of electric field emission, regardless of its power and frequency and also regardless of the proximity of said source to the area to be protected.

• This reduction in the environmental electric field levels produced by TELE SHIELD has the following benefits:

• Creates a more favorable environment for electronic and computer machines and equipment exposed directly to that field, since in many cases it reduces and adapts to the levels of the Electric Field environment to the maximum levels of immunity required by international Compatibility directives Electro Magnetic (eg CEE / 89/336, ...) and specifically international standards for immunity to Electric Fields (e.g. IEC EN 61000-4-3), thus guaranteeing the perfect functioning of said machines in the proximity of said source station

• It reduces the level of exposure of the Electric Field of people, thereby adapting to the levels that can be found in the open field, with the consequent psychological benefit for the exposed people and also possible physical benefit, according to various medical studies.

Description of the phenomenon: the massive introduction of mobile telephony has brought about a series of effects in our environment. The first and most important is increased electromagnetic pollution in the urban environment. Problems that until a few years ago were non-existent or irrelevant due to their low incidence, have become dangerous effects for electrochemical equipment and human health.

The main source of this radiation is the GSM repeater antennas (mobile telephony at 0.9 and 1.8 GHz). This type of antennas are usually sectorial antennas (usually of three sectors) with a great directivity (practically all the power is emitted in a certain direction) and powers of up to 1000 W. In diagram 1 typical antenna schemes are shown as well as their radiation diagrams

SUBSTITUTE SHEET (RULE 26) Taking into account the data shown in the previous drawings we can approximate the fields generated by a mobile phone antenna at 0.9 GHz, of a power of 1000W, according to drawing 2:

The electric field level lines have been calculated according to the propagation formula of a wave in free space, as shown below:

WD _r = (WG Mπr ²

Where:

WD _r : Power density at the study point (W / m ² )

WT: Power of the transmitting antenna (W)

GT: Gain of the transmitting antenna r distance (m)

E ² = DA

Where:

E: Electric field at the study point (V / m)

Zo: Air impedance (120π Ω)

After the installation of the TELESHIELD system, the electric field levels in open access areas would be reduced to more secure levels than in normative ones (see drawing 3).

Technology and Scientific Principles of TELE SEQELD: TELE-SHTELD is a protection system, based on the principle of reflection of electric fields. A surface when more conductive is, the more it will reflect an incident radio wave on it, and therefore, will reduce the level of the electric field. If the surface is partially covered by a screen of conductive materials (eg Copper, Nickel, Silver, ...) there will be some attenuation of electric field. The more extensive, complete, uniform, dense and closed (to prevent the entry of waves) this screen is, the higher the level of attenuation, (see Figure 4) that is installed in the most direct exposure area of the emitting source in question.

SUBSTITUTE SHEET (RULE 26) There are four models, all under the same philosophy and principle, but they vary depending on the surface where the TELE SHIELD system should be applied.

Model 1: TELE SHIELP of Installation Baio Emission Source on irregular surface.

• System designed to be installed on roofs of buildings, irregular surface (not flat) and diverse surface and nature (terrazzo, slate, etc.).

• Reduces electric fields of people and equipment located under the surface covered by TELE SHEELD.

• By identifying the type and power of the emission source, and knowing the emission directivity (direction and amplitude) of the same, the electric field that it generates can be calculated, and then, depending on the area under this direct exposure zone to be protected, the dimension of the TELE SHQELD to be installed will be calculated.

• The TELE SHBBLD Model 1 consists of an application of three chemical compounds in a liquid state that once applied, chemically solidify on the treated surface, creating a uniform electrically conductive surface, and which reflect part of the incident electric field.

• The chemical compounds to be applied consist of 3 layers: 1) 0.4mm thick layer of primer epoxy resin; 2) 0.5mm thick layer of conductive resin of NiCu compound of relative conductivity 0.8, 3) 0.5mm thick layer of color protection epoxy resin suitable for the surface where TELE SHIELD is installed, for protection against the degradation and corrosion (and consequent loss of electrical properties) that atmospheric agents can produce (sun, rain, snow, ...)

• The initial liquid state of chemical compounds allows their application on any type of geometry. Likewise, other variants and adaptations can be made depending on the nature of the surface to be treated (if it is porous, or irregular, or sandy).

• Although, the installation of TELE SHIELD Model 1 follows a universal and common method, each installation must be previously evaluated and

SUBSTITUTE SHEET (RULE 26) Perform a simple individualized project for each installation.

See drawings 5 and 6 for configuration and installation scheme.

• Model 2: TELE SüiiXD Installation Under Emission Source on Flat surface.

• System designed to be installed on roofs of buildings, flat surface (not flat) and diverse surface and nature (terrazzo, slate, etc.).

• Reduces the electric field of people and equipment located under the surface covered by TELE SHTELD.

• By identifying the type and power of the emission source, and knowing the emission directivity (direction and amplitude) of the same, the electric field that it generates can be calculated, and then, depending on the area under this direct exposure zone to protect, the dimension of the TELE SHTELD to be installed will be calculated.

• The TELE SHTELD Model 2 consists of an installation of one or several rectangular metal plates (dimension lOOcm x lOOcm or another, depending on the architecture of the area to be installed), which create a uniform electrically conductive surface, and reflect part of the field electrical incident.

• The conductive metal plate consists of: 1) Imm plate of galvanized steel thickness, with 50% Fe (iron) compound of dimension lOOcm x lOOcm or otr; 2) 0.4mm thick layer of primer epoxy resin 3) ü.5mm thick layer of conductive resin of MCu compound of relative conductivity 0.8, 4) 05mm thick layer of suitable color protection epoxy resin to the surface where the TELE SEQELD is installed, for protection against degradation and corrosion (and consequent loss of electrical properties) that may be produced by atmospheric agents (sun, rain, snow, ...)

• Said plate must be fixed by means of security fasteners to the surface where it rests, to avoid voluntary or accidental displacements (by wind, ...).

• Although, the installation of TELE SHIELD Model 1 follows a universal method

SUBSTITUTE SHEET (RULE 26) and common, each installation must be previously evaluated and a simple individualized project will be carried out for each installation.

See drawings 7 and S for configuration and installation scheme.

• Model 3: TELE SHIELD of Installation Under Emission Source for Interior of Buildings.

• System designed to be installed under electric field emitters located inside buildings (eg GSM telephone signal repeaters for the interior of buildings), normally hanging from the ceiling or walls.

• Reduces the electric field of people and equipment located under the surface covered by TELE SHBBLD.

• By identifying the type and power of the emission source, and knowing the emission directivity (direction and amplitude) of the same, the electric field that it generates can be calculated, and then, depending on the area under this direct exposure zone to protect, the dimension of the TELE SHEELD to be installed will be calculated.

• The TELE SHEELD Model 3 consists of an installation of a rectangular metal plate (of adequate size to the emission source), which creates a uniform electrically conductive surface, and which reflect part of the incident electric field.

• The conductive metal plate consists of: 1) lmm thick galvanized steel plate of variable dimension; 2) 0.4mm thick layer of primer epoxy resin; 3) 0.5mm thick layer of conductive ream of NiCu compound of relative conductivity 0.8, 4) 05mm thick layer of color protection epoxy resin suitable for the surface where TELE SHIELD is installed,

• For protection against degradation and corrosion (and consequent loss of electrical properties) as well as for the interior decoration of the building.

• This plate must be fixed to the ceiling or wall, by means of rods or fixing elements to prevent it from moving or can be easily removed.

• Although, the installation of TELE SHIELD Model 3 follows a universal method

SUBSTITUTE SHEET (RULE 26) and common, each installation must be previously evaluated and a simple individualized project will be carried out for each installation.

See drawings 9 and 10 for configuration and installation scheme.

• Model 4: TELE SMlELP of Installation in Front or Adjacent to Emission Source on irregular surface.

• System designed to be installed on facades (outside or inside) of buildings, irregular surface (not flat) and diverse surface and nature (terrazzo, slate, etc ...) located in front of the source of emission of Field Electric or adjacent to it.

• Reduces electric field of people and equipment located under the surface that covers the TELE SHEELD.

• By identifying the type and power of the emission source, and knowing the directivity of emission (direction and amplitude) of the same, the electric field that it generates can be calculated, and then, depending on the area near this area of direct exposure to protect, the dimension of the TELE SHTELD to be installed will be calculated.

• The TELE SHIELD Model 1 consists of an application of three chemical compounds in liquid state that once applied, chemically solidify on the treated surface, creating a uniform electrically conductive surface, and reflecting part of the incident electric field.

• The chemical compounds to be applied consist of 3 layers: 1) 0.4mm thick layer of primer epoxy resin; 2) 0.5mm thick layer of conductive resin of ÍCu compound of relative conductivity 0.8, 3) 05mm thick layer of epoxy resin of suitable color protection to the surface where the TELE SHIELD is installed, for protection against degradation and corrosion (and consequent loss of electrical properties) that can be produced by atmospheric agents (sun, rain, snow, ...), as well as decoration.

• The initial liquid state of chemical compounds allows their application on any type of geometry. Likewise, other variants and adaptations can be made depending on the nature of the surface to be treated (if

SUBSTITUTE SHEET (RULE 26) it is porous, or irregular, or sandy).

• The application of TELE SHDELD Mod.4 should be complemented to achieve greater effectiveness with the installation of conductive NiCu fabrics and 0.5mm grid size, (mosquito net), in the windows of the affected area to create a conductive zone without large openings and optimize electric field attenuation.

• Although, the installation of TELE SMELD Model 4 follows a universal and common method, each installation must be previously evaluated and a simple individualized project will be carried out for each installation.

See drawings 11 and 12 for configuration and installation scheme.

SUBSTITUTE SHEET (RULE 26)

Claims

2. Claims.With regard to the best areas of application, we can list: • Roofs of Buildings where transmitting / receiving antennas of mobile telephony or other radio frequencies are located • Areas of buildings located in front of or near transmitting / receiving antennas of mobile telephony or other radio frequencies. It is claimed that: 1. Applications are areas of direct exposure to transmitting / receiving antennas of mobile telephony, outside and inside Buildings; direct exposure areas commercial radio stations; direct exposure areas of civil and military radars; Direct exposure areas of other radio frequency stations. 2. TELE-SÉDELO reduces the Electric Field levels for areas directly exposed by emission sources. 3. The electric field reduction levels are up to 10 dB, so that the final levels obtained in the areas protected by the TELE-SHEELD are below the maximum levels required by the Electric Field Immunity limit regulations, reducing on the one hand the risks of malfunction of electronic and computer equipment, and on the other, reducing the possible risks to human health, according to certain medical studies. 4. The TELE-SHIELD is easy to install, in its different versions, and can be adapted to any surface and application. SUBSTITUTE SHEET (RULE 26)