20W 3G Band Selective Repeater /Wireless Phone Booster/ Mobile Repeater (GW-43BSRW)

Product Overview

A single-band RF repeater built for 3G networks, this 20 W unit is the largest of four power classes sharing one platform. It relays 3G traffic between a base station and the handsets in a weak or blind area, repeating both directions on the same frequency, so a site the network barely reaches starts behaving like one next door to the mast.

The four classes are 33 dBm, 37 dBm, 40 dBm and 43 dBm, and the last is the 20 W version described here. Choosing between them is a matter of how much area has to be filled and how much signal is available at the donor point: a single floor with a short cable run sits comfortably on a lower class, while a larger building or a long feeder run wants the headroom of the top one.

The housing is cast in aluminium alloy and rated IP65, finished white with a blue base and a blue front frame. A hinged cover lifts to a recessed metal panel carrying the connectors and switches, with small rating labels set on the top and the front edge. That is what lets a properly sited unit sit at a tunnel mouth, a village mast or a rooftop for years — the working life of an outdoor cell phone signal booster is decided as much by its enclosure as by its amplifier.

Nothing about it is plug-in. It expects a donor antenna, a coverage antenna or a distribution network, and an installation that has been thought through: survey, isolation, cable route and commissioning.

In short, it is a commercial cell phone signal booster for sites where the network is thin and coverage has to be engineered rather than bought off a shelf.

Signal Path, Step by Step

1. The donor antenna captures the downlink. Mounted on a roof, mast or facade where the base station arrives strongest and cleanest, it feeds the received 3G downlink down the cable to the repeater.
2. The filter isolates the working band. A high-selectivity filter with low insertion loss passes the 3G band — or, on a channel-selective build, only the channels you named — and keeps the uplink and downlink from interfering with each other.
3. The linear amplifier lifts the signal without lifting the noise. High gain with low noise: the wanted signal rises, the noise floor stays where it was, which is what keeps the repeated cell usable for data as well as voice.
4. The coverage side fills the blind area. The amplified downlink leaves through the coverage port to a single antenna, or into a splitter-and-coupler network — the same way a commercial cell phone signal booster feeds a multi-antenna building.
5. The uplink repeats in reverse. Handset transmissions picked up by the coverage antenna are amplified and returned to the base station, so the link is two-way and a data session does not drop the moment it needs to send.
6. Handsets end up working less hard. With a stronger serving cell the phone transmits at lower power, which is where the longer battery life on a weak-signal site comes from.

Band-Selective and Channel-Selective Modes

• Band-selective repeats the whole working band. Everything inside the band the unit is built for is amplified, with the bandwidth set to the operator's allocation at the time of order.
• Channel-selective repeats only the channels you name. One, two, four, eight, twelve or sixteen channels are passed and the rest of the band is left alone.
• The selector handles several channels at once. A highly selective channel selector processes multiple channels simultaneously rather than stepping through them one at a time.
• Band-selective suits a single-operator band. When the whole allocation belongs to the operator you are serving there is nothing to filter out, and the whole-band version is the simplest fit.
• Channel-selective suits shared spectrum. Where several operators sit in the same band and you only need one of them, channel selectivity keeps the others out of the picture.
• Filtering does the heavy lifting. High selectivity with low insertion loss is what separates uplink from downlink and keeps the repeated signal clean enough to carry data.
• Both are set to your network. Working frequency and bandwidth follow the operator's requirement, so the unit behaves as a mobile phone signal booster for that slice of spectrum and nothing else.

Model Range and Specifications

Coverage Applications

• Hotels and guest floors. A donor antenna on the roof and a coverage antenna per floor, and the building has its own mobile phone signal booster; guests stop walking to the window to take a call.
• Basements, car parks and plant rooms. Below-grade space has no line of sight to any cell, so the coverage antenna does all of the work.
• Shopping malls and exhibition halls. Open floor plates full of steel and people; a splitter-and-coupler network spreads the repeated signal evenly across the concourse.
• Offices and mixed-use buildings. Meeting rooms away from the windows, lift lobbies and stair cores get coverage that follows the staff instead of stopping at the facade.
• Tunnels, cuttings and road sections. Stretches where the network disappears for a kilometre at a time, and where an outdoor cell phone signal booster earns its keep on the tunnel-mouth wall.
• Airports, tourism regions and golf courses. Wide open sites with sharp seasonal peaks; the unit is sized for the busy week, not the quiet one.
• Factories, mining districts and villages. Steel sheds and remote settlements where the nearest base station is a distance away but still within reach of a clean donor signal.
• Highways and rural stretches. Long, thin coverage areas served from one or two antennas rather than a full distribution design.

Installation and Site Conditions

1. Survey the donor side first. Walk the roof, mast or facade and find the point where the wanted signal is strong and clean; the loudest reading is not automatically the quietest one to repeat.
2. Confirm there is a cell to relay. The unit has to sit inside the base station's coverage area — it repeats an existing signal and cannot manufacture one where none arrives.
3. Measure the distance to the BTS. Around 2 km between the base station and the area to be covered is the working limit; past that the donor signal is usually too thin to repeat cleanly.
4. Agree the isolation before anyone drills. Separation, building mass between the two antennas and careful aiming all matter, and the coverage antenna has to work away from the donor rather than back into it.
5. Route cable and weatherproof every joint. Feeder runs, connectors and cable entries are where water gets in, and a taped outdoor joint is simple insurance against a return visit.
6. Commission on a handset, not on the meter alone. Walk the target area on a real call and a real data session, then check the uplink at the base station before signing the site off.
7. Write the settings down. Record what was installed and how the unit is configured, so the next visit starts from a known state rather than from scratch.

Frequency-Shift and Fibre Repeater Comparison

Ordering and Delivery

Four things decide the configuration of a commercial cell phone signal booster built for your network: the 3G band being repeated and, for a channel-selective version, the channel list; the power class you want from the 33, 37, 40 and 43 dBm options; a short site description covering indoor or outdoor use, the area to be filled, the distance to the base station and whether a donor antenna, coverage antenna or distribution network already exists; and whether the wireless modem for NMS supervision should be fitted.

Tell us what the site already has. If antennas, feeder cable, connectors or mounting hardware need to come with the unit, ask and we will confirm what can be supplied for your configuration rather than leave you to assume a complete kit.

Terms are quoted per project — price, lead time, packing and shipping follow the configuration and the destination — so confirm them with your sales contact once the specification is fixed. A cell phone signal booster heading to a remote or exposed site is worth discussing before it ships, because how it is packed and how it is mounted both matter on arrival.

Technical Support & Model Matching

Getting the right model matters more than anything else, so Greetwin builds technical support into every order. Tell us the band, the site and the coverage you need, and our engineers will match a model to it, check gain and output power against your installation, and say plainly when something will not fit. We also advise on antenna placement, cabling and commissioning, then stay with you through troubleshooting once the system is running. All of this is backed by our ISO 9001 certified production in Shenzhen, responsive after-sales service and spare parts.

FAQ