Over the last few years, the need for indoor cellular radio coverage has increased as a result of the ever-increasing number of applications now running on mobile networks. However, it is not always possible for the outdoor signal to easily reach the inside of the building (historic buildings with large walls, presence of glass and shielding walls, basement rooms, buildings constructed according to green building criteria, etc.).
A system of mobile coverage must not be improvised; it requires the use of certified products and installation by specialised personnel.
Irbema is able to follow the project (whether small or large) in all its phases, from the technical analysis (survey) carried out with professional instrumentation, to the development of the technical-economic project, to the supply and installation of the system, guaranteeing compliance with the requirements of the regulations and of the mobile telephony operators, holders of the concessions on the respective frequency bands.
We realise systems using digital repeaters selective digital band, approved by mobile phone operators through laboratory testing (PQR) and network integration (PVV), and realised in accordance with the design criteria defined by mobile operators.
The repeaters are designed and engineered to avoid interference to the transmission cells of telephone operators, work with any telephone operator and are compatible with all mobile phones, smartphones and safety phones on the market.
The amplifiers are equipped with an ACG (automatic gain control) function to keep the output power level constant in the presence of any changes in external signals, and are able to automatically detect any self-oscillation (signal looping) caused by insufficient isolation between the external antenna and the internal antenna.
The products can be easily configured for single or multi-operator use and support any wireless technology, including GSM, EDGE-DCS, UMTS and LTE in the established cellular bands (800 MHz, 900 MHz, 1800 MHz, 2100 MHz and 2600 MHz).
Where necessary, the combination of several devices ensures full coverage of all services.
The repeaters are connected to a donor antenna located outside the building.
A network of omnidirectional antennas (radiating over an area of approximately 100 square metres in open space) connected to a backbone line consisting of couplers and splitters ensure widespread room coverage.