Collection: Fiber Cellular DAS Distributed Antenna System Booster

What is Fiber Cellular DAS? Why is it Important to Business?

The Distributed Antenna System (DAS) is a network consisting of a number of antennas distributed throughout a building and specially used to provide wireless indoor coverage. DAS systems provide operators with a more efficient indoor coverage solution than small, distributed indoor base stations (microRBS). For example, it can increase the number of relays on wireless interfaces and transmission links, so that each wireless link is readily available anywhere in the building. That, in turn, improves spectrum efficiency, allowing operators to handle traffic peaks. RBS only needs one transmission line to cover the entire building. This not only greatly improves the transmission and relay efficiency, but also reduces the transmission overhead of each RBS. In addition, DAS solutions make it easy for operators to control and limit coverage within buildings to reduce interference with macro cellular networks, thereby increasing the total capacity of the network. In many cases, especially within buildings, tunnels, large public Spaces, sports stadiums, etc., signals from cell towers do not provide adequate coverage, or the density of users is beyond what can normally be handled. In these cases, the coverage of these areas can be expanded by installing a distributed antenna system (DAS), or by pairing base station transceivers (BTS), NodeBs, enodebs, or Small cells to provide better service to a large number of users.

Compared with the distributed antenna system using coaxial cable, fiber optic cellular distributed antenna system uses fiber instead of coaxial cable to transmit the bidirectional upstream and downstream signals amplified by cellular amplifier between outdoor antenna and indoor antenna. Therefore, in addition to the receiving, amplifying and filtering components of ordinary amplifier, fiber optic distributed antenna system A device is also needed to convert an RF signal into an optical signal, transmit it and then restore it to an RF signal.

Key Things to Know Before Buying?

1. Measure frequency bands before buying. It can only be used if the frequency band matches. No amplifier is going to work if the frequency band doesn't match.

2. Measure the outdoor dbm before purchase. SolidRF Fiber DAS 4400 can cover up to 100,000 square feet, but only if your outdoor signal is strong enough. This applies not only to the SolidRF Fiber DAS 4400, but to all signal boosters.

3. Confirm the orientation of the base station. Outdoor antennas need to receive signals from cell towers. So you need to find the signal tower closest to you, and place the outdoor antenna towards the signal tower for better signal reception. If the towers of different operators are expected to be accessed in different directions, the outdoor antenna can use an omnidirectional antenna, which has slightly less reception capability than the directional antenna, but has reception capability in all 360 degree horizontal directions, and can balance the towers in different directions.

4. Estimate the distance between an outdoor antenna and an indoor antenna. If you want to place indoor and outdoor antennas more than 100 feet apart, the best option is a fiber optic signal amplifier. Because the cost of ordinary cable is very high and the longer the cable, the greater the loss. But no matter how long the fiber is, the loss to the signal is very, very small.

5. Have an adequate budget. It is more expensive than ordinary amplifiers.

Features of our products

SolidRF Fiber DAS 4400 is a powerful commercial-grade signal enhancement system. It boosts 2G/3G/4G/LTE signals from all major carriers in North America. Band2/4/5/12/13 are supported. Based on existing external signal strength, SolidRF Fiber DAS 4400 can cover up to 100,000 square feet.

SolidRF Fiber DAS 4400 has two outdoor antenna ports and four indoor antenna ports. Two outdoor antenna ports allow SolidRF Fiber DAS 4400 to simultaneously target multiple towers in different directions. This multi-tower positioning (MTT) means that users can install up to two different external antennas to capture existing cell phone signals. In challenging signal environments, different carriers may send the strongest signals from different directions, depending on the location of the cell towers. The SolidRF Fiber DAS 4400 also has four indoor antenna ports, all of which are equipped with up to 17 dBm of downlink power and 25dbm of uplink power. Both ends of the antenna can be regarded as an active antenna, receiving sensitivity and maximum transmission power have been improved.

The main unit (MU) of the system receives signals from one or two external donor antennas. MU amplifies the signal it receives and sends it to the remote unit (RU) via a fiber-optic cable. Fiber optic mainlines can be as long as 3,300 feet (1 km) without any significant signal loss. RU again amplifies the signal it receives and distributes it to mobile phones and cellular devices via its indoor dome antenna. Each RU has 4 antenna interfaces, which can support 1 ~ 16 antennas depending on the strength of external signals.

Different from the ordinary amplifier, the optical fiber signal amplifier divides the ordinary amplifier into two parts, respectively installed near the outdoor antenna and the indoor antenna, so that the outdoor antenna and the indoor antenna can be regarded as the active antenna, improve the receiving sensitivity and transmission power. The two parts of the amplifier convert radio frequency signals of each frequency band into optical signals, and use optical fibers to transmit signals up and down the line. At the other end, the optical signals are converted into radio frequency signals of each frequency band and continue to amplify. Because the optical fiber loss is very small, usually 0.2-0.4dB/km, the length of the fiber can be much longer than that of the coaxial cable, and the thin fiber is much easier to install than the heavy and expensive coaxial cable.

SolidRF Fiber DAS 4400 is a combination of passive and active DAS technology, compatible with both advantages. The passive DAS technique uses the donor antenna to couple the wireless system to the cellular base station and redirects the signal to the target transmission antenna using a coaxial transmission line. These wires use diplexers to realize the downlink and uplink. This is usually the fastest and least costly method. After converting an RF signal into a digital signal, the active DAS technology sends it to a remote unit (RU), which in turn converts the digital signal back into an RF signal for use by the user's equipment. This method can reduce the amount of RF amplification and RF transmission lines required for signal distribution in passive DAS technology. In addition, the method reduces routing complexity because it enables the transmission of digital RF signals using industry-standard Ethernet or fiber optic cables that significantly increase the length of available cables and reduce system expansion costs and complexity. 

SolidRF Fiber DAS 4400 is suitable for tall buildings where the distance between the external donor antenna and the area to be covered by the signal is large. Cellular reception is available in a variety of types of large buildings, industrial and utility sites, and many other applications.

SolidRF Fiber DAS 4400 delivers powerful cellular voice and faster data speeds for multistory buildings and large facilities that other commercial cellular amplifiers cannot handle, and at a fraction of the cost of active DAS systems installed by operators.

Frequently Asked Questions(FAQs)

  • Is SolidRF Fiber DAS 4400 FCC Approved?

          FCC approved

  • What carriers support?

          Supports all nationwide and regional carriers in the United States, including AT&T,  Verizon, T-Mobile, Sprint, U.S. Cellular, and more. Supports all major Canadian carriers, including Rogers, Telus, BCE, Shaw, and more.

  • Up to how many miles will a cell signal booster reach to cell signal towers?

          It can be more than five miles, depending on the tower's downlink power and transmission path.

  • How many users can the SolidRF Fiber DAS 4400 support concurrently?

          5-10 per band. It depends on the capacity of the base station.

  • Maximum length of singlemode fiber optic cable between the master unit and remote unit(s)

          50km. It is much longer than the length used in the actual scenario.

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