Stella Doradus Repeater FAQ

According to Stella Doradus, its broadband repeaters are fully legal across the EU, UK and Ireland. The manufacturer states that the repeaters pass the applicable European Radio Equipment Directive (RED) requirements together with Ofcom and ComReg specifications.

In everyday usage, the terms “signal booster”, “booster” and “repeater” are often used for the same product category. In professional applications, the important points are supported frequency bands, filtering architecture, automatic gain control, oscillation detection and network-protection functions.

Stella Doradus products are designed as cellular repeaters and use automatic RF-control functions intended to keep repeater output under controlled operating conditions.

No. Important selection criteria include supported frequency bands, gain, output power, coverage scale, filtering architecture, automatic RF controls, monitoring capability and the number of indoor service antennas required by the project.

A repeater for a home or small office does not use the same system architecture as a multi-floor hotel, factory or large commercial building.

Mobile phones, base stations and repeater systems use RF energy. Evaluation should be based on applicable electromagnetic-field exposure limits and the technical conformity requirements relevant to the installation.

Health-related assessments should rely on guidance and exposure limits published by competent authorities, rather than on product marketing claims.

Small systems may look simple to install physically, but correct operation depends on donor-antenna direction, donor-to-service antenna isolation, cable loss, operating bands and repeater gain.

For commercial and multi-antenna projects, an RF survey and technical design before installation are recommended.

Reinforced concrete, metal surfaces, coated or filtered glass, basement floors, lift cores and other structural losses can significantly attenuate cellular signals. Distance from the base station and surrounding terrain can also affect the available donor signal.

For this reason, an operator may provide usable service outdoors while the same network becomes weak or unstable inside the building.

A repeater does not create a new cellular network. A usable donor signal of sufficient quality must be available at the outdoor antenna location.

No signal on a phone indoors does not necessarily mean that there is no usable signal on the roof or exterior facade. The installation decision should be based on outdoor RF measurements.

Antenna type and placement depend on building geometry, floor layout, wall losses, ceiling height and the way the target area is used. Ceiling-mounted omni antennas are commonly used for open areas, while panel antennas can be used where directional coverage is required.

A repeater is not a base station that registers users or allocates network capacity. It transparently carries cellular RF signals within the supported frequency bands.

The number of simultaneous users is determined mainly by the donor cell's available capacity, spectrum, traffic load, signal quality and the RF design of the repeater system. “Unlimited users” is therefore not a technically meaningful capacity specification.

Yes. Within the services supported by the mobile network and user devices, different users can simultaneously generate voice, messaging and mobile-data traffic. The repeater carries this traffic at RF level within its supported bands.

If usable outdoor signals from multiple operators are present within the repeater's supported frequency bands, several operators can be distributed through the same system. The actual result depends on local spectrum use and the band configuration of the selected repeater model.

Yes, when site conditions are suitable. A usable donor signal, correct donor-antenna alignment, sufficient donor-to-service antenna isolation and appropriate RF distribution design are required.

The repeater's role is to bring an existing usable mobile signal into the building; it cannot create a network that is not available at the donor-antenna location.

As explained throughout this Stella Doradus repeater FAQ, product families can provide automatic gain control, oscillation/feedback detection, uplink control, RF power management based on base-station signal level, remote monitoring and PortSense connection verification.

The Stella Doradus repeater FAQ recommends using real RF measurements rather than phone signal bars alone. A professional assessment should measure the operator, active LTE/5G bands, signal level and signal quality at the intended donor-antenna location.

For LTE systems, RSRP, RSRQ and SINR should be evaluated together with frequency/band and cell information where available. The usable donor signal measured on the roof or exterior facade is the starting point for repeater design.

With weak outdoor signal, a higher-gain directional antenna and low-loss RF cable may be required. If no usable signal is available at the outdoor antenna location, a repeater may not be the correct solution.