RU2818742C1 - Device for minimizing electromagnetic radiation of cellular telephone - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: invention relates to means of protection against electromagnetic radiation (EMR), and more specifically to devices for protection against cellular telephone radiation. Device which minimizes electromagnetic radiation of cellular telephone (5) consists of receiving antenna (1), a unidirectional repeater amplifier (2) and transmitting antenna (3). Receiving antenna is located inside the room and is connected to a unidirectional repeater amplifier. Transmitting antenna is connected to a unidirectional repeater amplifier and is located outside the room.

EFFECT: considerable reduction of electromagnetic radiation of a cellular telephone is achieved.

1 cl, 1 dwg

Description

The claimed invention relates to means for protection against electromagnetic radiation (EMR), and more precisely to devices for protection against cell phone radiation.

There are a large number of devices and methods by which it is proposed to protect the subscriber from radio frequency EMR (RF EMR) of a cell phone.

The majority are made up of various stickers that are supposed to “absorb” and “neutralize” cell phone EMR (RU 15659 U1 published on 11/2000/10, RU 8837 U1 published on 12/1998/16, RU 2206945 C1 published on 06/2003/20, RU 2482580 C2 published on 2013/05). 20 , RU 2186585 C1 published 2002.08.10, RU 2210398 C1 published 2003.08.20, US 7485885 B2 published 2009.02.03).

You can find proposals for “the use of a protective agent that has an effect on electromagnetic waves, for which native gold is used” (RU 2339195 C1 published 2008.11.20).

The mechanism of action of this kind of solutions is not scientifically substantiated, and the result of their application is questionable.

Various types of shielding covers are known (RU 2396890 C1 published 2010.08.20, RU 2234200 C2 published 2004.08.10). But since cellular communication is a type of wireless information transmission that uses electromagnetic radiation in the radio frequency range as the information carrier, such cases will block the operation of the phone when the phone is in the case, and will have no effect if it is removed.

Patents of little use include protective clothing (RU 2381042 C1 published 2010.02.10). Despite its effectiveness, everyday wearing of special protective clothing with conductive threads is difficult.

The use of remote headsets, both wired and wireless, and the use of remote antennas (RU 2492589 C2 published 2015.02.10) makes using a cell phone inconvenient.

With a constant flow of electromagnetic radiation (EMR), there are only three methods of protection: time, shielding and distance.

Time protection is a limitation of the duration of stay in the radiation field. In other words, it is necessary to reduce call time as much as possible as prescribed by SanPiN.

Shielding protection. The use of shielding suits and other protective equipment made from fabrics with conductive threads in everyday life is not possible. And using a shielding case for a cell phone deprives you of communication.

Protection by distance. The intensity of radiation decreases with increasing distance from the source according to the inverse square law: when the distance to the radiation source increases by 2 times, its intensity decreases by 4 times, etc.

This method seems to be the most applicable and effective. But using a wired or Bluetooth headset can somewhat reduce the impact only if the phone is kept at a distance from the person’s body. The most effective way is to connect an external antenna located outside the premises to the mobile phone.

Antenna is a device that converts the energy of a radio transmitter into electromagnetic radiation.

Unfortunately, none of the methods allow you to use a cell phone in the convenient mode to which everyone is accustomed.

Ensuring maximum subscriber protection while maintaining ease of use is only possible by reducing the radiated power of the telephone transmitter, but at the same time it is necessary to ensure the required signal level in the receiving path of the base station.

In modern cellular networks, base stations control the phone's power output using service commands.

This makes it possible to ensure efficient use of the frequency spectrum available to the operator, create an optimal operating mode for the base station receiver and save battery energy, increasing the battery life of the phone.

When adjusting the output power, the base station strives to maintain the level of the received signal from the phone within optimal limits. In other words, the phone's radiation level will be reduced to a minimum value that ensures the required communication quality.

Even by going to the window, you will reduce the attenuation of the radio signal on the way from the phone to the base station and thereby achieve the greatest reduction in radiated power.

The invention I propose can reduce the EMR of a cell phone many times. As a result of experiments, a decrease in transmitter power was recorded from 1000 mW (the maximum transmitter power of a modern smartphone) to 1 mW.

The technical result of this invention model is a significant reduction in RF EMR of a cell phone.

The above technical result is achieved by installing a receiving antenna inside the room connected to a relay-amplification unit, which is connected to the power grid, and is also connected to a transmitting antenna located outside the room. The subscriber is protected from the influence of an external transmitting antenna by distance and shielding by walls. In addition, due to the outdoor location, the attenuation on the path from the transmitting antenna of the repeater-amplifier to the base station is lower and this allows the use of less output power of the transmitter of the repeater-amplifier.

Special bidirectional signal amplifiers are known that are used to expand the coverage area of cellular communications; their use can also reduce the level of EMR of a cell phone, but they, in turn, are themselves constant sources of EMR in the radio frequency spectrum, negating the entire positive effect of their use.

The main advantage of using a one-way repeater-amplifier is the absence of RF EMR inside the room, since the downward communication channel is received by the cell phone directly from the base station. In addition, a one-way amplifier is much cheaper, its installation causes fewer difficulties in ensuring the required insulation between the internal and external antennas of the repeater-amplifier, and power consumption is much lower.

Brief description of drawings

The drawing (Fig. 1) shows the principle of operation of the device, on which:

1 - receiving antenna,

2 - unidirectional amplifier-repeater,

3 - transmitting antenna,

4 - cellular base station,

5 - cell phone,

6 - downward communication channel from the base station to the phone,

7 - uplink communication channel from the phone to the base station.

Claims (1)

A device that minimizes electromagnetic radiation from a cell phone, consisting of an indoor receiving antenna connected to a unidirectional amplifier-repeater, to which is connected a transmitting antenna located outside the premises.