Repeaters can boost the cell phone signal and mobile internet of any mobile operator (O2, Three, Telekom, EE, Vodafone and many others).
Repeaters have a number of features that you should look for when choosing a repeater. These are mainly the frequency range, gain and maximum output power.
Here you can buy a mobile repeater for any operator.
Currently, mobile operators in Europe use 5 frequency bands:
Band 1 – 2100 MHz (3G standard).
Band 3 – 1800 MHz (2G, LTE).
Band 7, 38 – 2600 MHz (4G, LTE, LTE TTD)
Band 8 – 900 MHz (GSM 2G, 3G)
Band 20 – 800 MHz (LTE)
Frequency distribution between operators
Band 38 uses the same frequencies as Band 7, but a completely different type of data transmission – TDD (Time Division Duplex). Reception and transmission take place on the same frequency and are separated only by time intervals. Unfortunately, any error in the synchronization of this channel results in a loss of signal, so it is not possible to amplify the signal from band 38 with a repeater.
Each frequency band has its own minimum power level.
Example values are listed below:
900 MHz – 88dBm.
1800 MHz – 93dBm
2100 MHz – 98dBm
2600 MHz – 102dBm
A GSM repeater can amplify a cellular signal in one, two or more bands, but then the cost increases in direct proportion to the number of bands amplified.
Therefore, when choosing a mobile booster, you should first determine the frequencies to be amplified. It is by no means necessary to amplify all frequencies to ensure good communication. All subscriber devices have certain priorities and it is sufficient to amplify only the frequencies that are necessary in a particular case.
All modern mobile phones are designed to operate on the Internet.
When your phone is looking for a signal, it starts to cycle through the frequencies in the following order:
4G 2600 MHz ➨ 4G 1800 MHz ➨ 4G 800 MHz ➨ 3G 2100 MHz ➨ 3G 900 MHz ➨ 2G 1800 MHz ➨ 2G 900 MHz
Your phone will use the first available frequency even if the signal is very weak.
If you choose the wrong amplifier, the result may not be as expected. We recommend you to pay attention to the 4G amplifiers in our store.
Amplification
Any GSM, 3G or 4G mobile signal booster amplifies a weak signal and this parameter varies depending on the model. In practice, there are cases when the level of the incoming signal is too high and the repeater is overloaded, so it can not fully exploit its gain potential. For this case, all Rangeful repeaters have a manual and automatic gain control.
Output power
To cover large areas, more signal power is required, and the maximum output power of the repeater becomes relevant. Regardless of what signal originally reached the repeater, it cannot output more power than its electronic components allow. So if a signal of -35 dBm is applied to a high power amplifier with parameters of 65 dB * / 17 dBm, it is not possible to get 30 dBm at the output because the output transistors are simply not capable of producing such a signal level, and the automatic gain control will adjust the gain to the required level so that the allowable 17 dBm is not exceeded. If you need more power for communication, you should choose a more powerful GSM repeater or add a suitable inline amplifier to the system.
Certification in Europe
When choosing repeaters, you should not only be guided by the technical features and price, but also by the possible consequences of their use. An improperly installed repeater can severely interfere with the operators’ base stations, which may ultimately attract the attention of authorities monitoring radio frequencies.
If the device is not certified in the European Union, your actions will be considered malicious, with the corresponding consequences – confiscation of equipment, fines, etc.
Are repeaters dangerous to human health?
According to the health standards and EU regulations, the intensity of the electromagnetic field in the microwave range (0.3-300 GHz) must not exceed 0.5 W / m2.
As a rule, the radiated power of the antennas of a mobile repeater system does not exceed 30 mW, which is significantly lower than the permissible limit but is sufficient for safe signal reception by subscriber devices.
By comparison, the radiated power of a known WiFi router is between 100 and 200 mW. We put ourselves at much greater risk when we are near a mobile phone in an area with weak signal reception because in-network search mode the phone can emit up to 2 W, which is more than 60 times the radiation of the repeater antenna. It is also important to know that the phone requires power for such radiation and its battery will be discharged within a few hours in this mode.
Now that we know the required frequency, signal level and characteristics of the device, so we can calculate the required power of the repeater system and select the appropriate Rangeful Repeater.