Mobile phone signal amplifier working principle

Release time:

2018-03-10


Mobile phone signal amplifier working principle

With the rapid development of mobile communication networks, network coverage is expanding. Wireless communication relies on the propagation of electromagnetic waves to establish communication links. However, due to the continuous development of various buildings and traffic roads, they are blocked by buildings. In some tall buildings, basements, shopping malls, restaurants, home furnishings, entertainment venues and many other places, there are still some weak links in wireless communication that cannot meet the needs of customers. The mobile phone signal is very weak, so that the mobile phone cannot be used normally. At present, there are mainly the following problems:
1) Blind area: the signal is lower than the receiving sensitivity of the mobile phone after loss, resulting in poor communication of the mobile phone;
2) Weak area: The signal is mainly lower than the mobile phone receiving sensitivity after loss, resulting in poor mobile phone calls;
3) Conflict zone: mainly high-rise building area wireless signals from multiple cells, and mostly unstable reflection signals on the ground and walls, resulting in frequent switching (I. e. ping-pong effect), seriously affecting the normal communication of mobile phones;
4) Busy area: mainly in areas with large traffic, the base station capacity is difficult to meet the communication needs, and users cannot access the mobile network for normal communication.
The mobile phone signal amplifier (micro repeater, also called mobile phone signal booster) is a product specially designed to solve the above weak area of mobile phone signal. Such products have the characteristics of small size and flexible installation, and can cover indoor signals in depth. Practice has proved that they can provide stable and reliable signals for indoor mobile communication users, so that users can also enjoy high-quality personal communication services indoors.

The working principle of 1. mobile phone signal amplifier (micro repeater)
1) Downlink: The useful signal that can be called received by the outdoor Yagi antenna is input to the host, and after being amplified by the host, it is sent to the indoor ceiling antenna for transmission. In this way, a stable and reliable signal can be received by the user's mobile phone in the room at any time. This is down.
2) Uplink: The signal transmitted by the indoor user's mobile phone is absorbed by the ceiling antenna, input to the host, then amplified by the host, and then sent to the outdoor Yagi antenna for transmission to the base station. This is the upside.

▲ Working principle of mobile phone signal amplifier
2. mobile phone signal amplifier (micro repeater) applicable communication network type
At present, the mobile phone signal amplifiers on the market basically cover all communication network types, including: China Mobile, China Unicom's GSM(2G low frequency) network and DCS(2G high frequency) network, China Unicom's W-CDMA(3G) network, China Telecom's CDMA(2G and 3G) network.
Type of 3. cell phone signal amplifier (micro repeater)
1. According to whether there is a display screen, there are:
1) Mobile phone signal amplifier without display, this is an ordinary type.
2) The mobile phone signal amplifier with a display screen, which is the so-called smart mobile phone signal amplifier, is newly released on the market recently. This kind of machine has an obvious advantage, which can detect the signal strength received by the antenna and display it in real time. In this way, it is easy to adjust the orientation of the antenna.
2. According to the supported network types, there are:
1) Single-frequency mobile phone signal amplifier is an amplifier that supports one frequency, including GSM mobile phone signal amplifier (supporting 2G low-frequency networks of China Mobile and China Unicom), DCS mobile phone signal amplifier (supporting 2G low-frequency networks of China Mobile and China Unicom), W-CDMA mobile phone signal amplifier (supporting 3G networks of China Unicom), CDMA mobile phone signal amplifier (supporting 2G and 3G networks of China Telecom).
2) Dual-band mobile phone signal amplifier is an amplifier that supports two frequencies, including GSM/DCS dual-band mobile phone signal amplifier, GSM/W-CDMA dual-band mobile phone signal amplifier, etc.
3) Three-frequency mobile phone signal amplifier is an amplifier that supports three frequencies, including GSM/DCS/W-CDMA three-frequency mobile phone signal amplifier, GSM/CDMA/W-CDMA three-frequency mobile phone signal amplifier, GSM/CDMA/DCS three-frequency mobile phone signal amplifier, etc. This kind of machine is difficult to manufacture, so the cost is also very high. The total cost of three sets of machines with different frequencies is far less than that of a three-frequency machine. In addition, the power of the three-frequency machine is not large, and the coverage area is very small.
Application area of 4. mobile phone signal amplifier (micro repeater)
1) Signal blind areas or weak signal areas in small areas, such as underground or semi-underground business places, small basements, underground parking lots, etc.
2) Small hot signal complaint areas, such as conference rooms, small supermarkets, small shopping malls, office rooms, small public areas, etc.
3) areas with high traffic volume and social influence, such as bars, Internet cafes, song and dance halls, coffee shops, fitness clubs, leisure and entertainment places, etc.
4) Family, office, luxury yacht, private car, public security system and highway safety management, etc.
5) There is no signal in the large factory building.
6) Urban villages, rental houses, etc.
suit components 5. mobile phone signal amplifier (micro repeater)
1) Host;
2) Outdoor antenna: Yagi antenna, suction cup antenna, logarithmic antenna, glass fiber reinforced plastic antenna, flat antenna and other types;
3) indoor antenna: ceiling antenna, whip antenna, flat antenna and other types;
4) power divider: if you need to match multiple indoor antennas, you need to use power dividers, generally there are one-to-two power dividers, one-to-three power dividers, one-to-four power dividers, etc.
5) cable: 75-7, 50-5, 50-7, 75-5 and other several.
Functional characteristics of 6. mobile phone signal amplifier (micro repeater)
Mobile phone signal amplifier (micro repeater) generally has the following characteristics:
1) High gain linear power amplifier;
2) Automatic level control;
3) Ultra-low noise receiving amplifier;
4) There is no interference to the base station, and there is no need to adjust the parameters of the original system and base station after opening;
5) Stable and reliable electromagnetic compatibility design;
6) It will not cause the increase of the background noise of the base station, and will not cause the decline of the communication quality of the base station;
7) Full duplex communication;
8) Effective and reasonable heat dissipation, beautiful structure and suitable volume.
7. cell phone signal amplifier (micro repeater) signal coverage area
The mobile phone signal amplifier (micro repeater) will have many different powers, and there is a general correspondence between the power and the signal coverage area, as shown in the following table. But the actual coverage area is also related to the strength of the signal source and the wire used.

▲ Scope of application
8. installation method
Mobile phone signal amplifier (micro repeater) is generally for individual consumers, so the installation method is relatively simple. The following are schematic diagrams of installing an indoor antenna and installing multiple indoor antennas respectively for your reference:

▲ Installation diagram of mobile phone signal amplifier connected to an indoor antenna

▲ Installation diagram of mobile phone signal amplifier connected to multiple indoor antennas
When you need to install a mobile phone signal amplifier, you must buy a genuine product with a comprehensive installation manual, Taobao Century Hengrui Technology Specialty Store
With professional solutions to local conditions, enthusiastic return visits and excellent after-sales service, citizens are no longer affected by the life of bad signals.