No SIM Card Required
The repeater relays the available operator RF signal; a customer SIM card or fixed internet connection is not required for signal amplification.
Home-SOHO Repeater
RED Certified Full Band Repeater
GSM | 3G | 4G | 5G
B1 | B3 | B8 | B20
HOME · SOHO · SMALL OFFICE
Stella Doradus R4-LCD 4 Band Repeater
RED-certified full-band repeater for homes, villas, shops and small offices
B20 · 800 MHz | B8 · 900 MHz | B3 · 1800 MHz | B1 · 2100 MHz
The Stella Doradus R4-LCD is a four-band cellular repeater designed to improve indoor mobile coverage in homes, villas, small offices, shops and other SOHO environments where a usable operator signal is available outside but is weakened by walls, reinforced concrete, low floors, coated glass or building geometry.
The system receives the available outdoor cellular signal through a donor antenna, amplifies the supported bands and redistributes the signal indoors. It does not require a customer SIM card or fixed broadband connection for its RF repeater function.
4 Bands
LCD Interface
PortSense
1 Indoor Antenna Port
SOHO Coverage
Designed and Manufactured in Ireland
Stella Doradus repeater systems are engineered and manufactured in Ireland for professional indoor mobile coverage applications.
RED-Certified Platform
A professional full-band repeater platform for deployment under applicable European radio equipment requirements and project rules.
HOW IT WORKS
From Outdoor Mobile Signal to Indoor Coverage
R4-LCD does not create a new mobile network signal. A usable operator signal must be present at the outdoor antenna location. Correct antenna placement, RF isolation and cable design determine the final indoor coverage.
1
Outdoor Antenna
Receives the available mobile operator signal at a suitable point outside the building.
2
R4-LCD Repeater
Amplifies the supported cellular bands under automatic RF control.
3
RF Cable
Carries the signal between the repeater and the outdoor and indoor antennas with controlled cable loss.
4
Indoor Antenna
Redistributes the amplified cellular signal into the required room or indoor coverage area.
SOHO POSITIONING
Who Is R4-LCD Designed For?
R4-LCD is a single-port commercial-grade SOHO repeater. Depending on the available outdoor signal, room sizes, wall materials, antenna placement and RF losses, the system is designed for small and medium indoor coverage projects and can serve approximately up to five rooms.
- Homes and villas with weak indoor cellular coverage
- Small and medium-sized offices
- Shops, showrooms and small commercial spaces
- Basements and lower floors where building loss weakens the available outdoor signal
- Applications requiring improved voice and mobile-data coverage without a customer SIM card
Application limit: R4-LCD is positioned for SOHO-class projects. Large hotels,
hospitals, factories and widely distributed multi-zone buildings should use a scalable repeater and
RF distribution architecture such as StellaOffice or Titan.
KEY CHARACTERISTICS
Four-Band Indoor Coverage Platform
- B20, B8, B3 and B1 cellular-band support
- 800, 900, 1800 and 2100 MHz nominal bands
- LCD local interface
- PortSense antenna and cable connection checking
- Automatic RF-control functions for stable operation
- Single indoor antenna port
- Voice and mobile-data support on amplified bands
- 5G / 4G / 3G / 2G service support where those services are deployed on the amplified frequency bands
SUPPORTED BANDS
R4-LCD Frequency Bands and Technical Specifications
The following band structure reflects the R4-LCD configuration used on the BağLAN product page.
| Band | Nominal Band | Downlink | Uplink |
|---|---|---|---|
| B20 | 800 MHz | 791–821 MHz | 832–862 MHz |
| B8 | 900 MHz | 925–960 MHz | 880–915 MHz |
| B3 | 1800 MHz | 1805–1880 MHz | 1710–1785 MHz |
| B1 | 2100 MHz | 2110–2170 MHz | 1920–1980 MHz |
ModelR4-LCD
InterfaceLCD
Gain>60 dB UL / DL
Max. UL / DL Output20 / 10 dBm
Power Supply12 V DC / 3 A
PortSenseYes
Dimensions35 × 30 × 4.3 cm
Indoor Antenna Port1
SMART RF CONTROL
Automatic RF Functions for Stable Repeater Operation
R4-LCD uses automatic RF-control functions to help maintain stable operation and reduce the risk of oscillation, excessive output or unnecessary uplink activity.
Oscillation Detection
Detects feedback conditions caused by insufficient isolation between outdoor and indoor antennas and automatically reduces gain to help restore stable operation.
Automatic Gain Control
Monitors RF levels and adjusts gain to help prevent excessive output and keep the repeater within a suitable operating range.
Reduced Output When Idle
Reduces unnecessary RF output when there is no active voice or mobile-data communication through the repeater.
Base-Station Level Adaptation
Adapts repeater output according to the detected donor-signal level and the current RF environment.
MULTIPLE INDOOR ANTENNAS
Can R4-LCD Coverage Be Expanded?
Yes. Additional indoor antennas can be used with suitable splitters and RF cabling, provided the complete link budget is checked before installation.
Splitter and Cable Loss Must Be Included
Each additional splitter and every metre of RF cable introduces loss. Therefore, the number of indoor antennas should not be selected only from the number of rooms. Outdoor signal level, required indoor level, cable length, splitter loss and antenna gain must be evaluated together.
This is particularly important with a single-port SOHO repeater, where the available downlink power is shared between all branches of the indoor distribution system.
BağLAN RF Cable Calculation Tool
The BağLAN field calculation tool evaluates R4-LCD output power together with SD400-FR-2 cable loss, splitter loss and indoor antenna gain to estimate the applicable indoor distribution cable length.
PORTSENSE
R4-LCD Antenna and Cable Connection Checking
R4-LCD supports PortSense, a Stella Doradus connection-checking technology that helps installers verify the physical RF path between the repeater, cables, connectors and compatible antennas during installation.
Correctly connected compatible Smart Antennas and repeater ports provide visual LED confirmation. If the expected indication is not present, the installer can check the relevant RF cable, connector or antenna before proceeding with coverage and isolation measurements.
PortSense simplifies the physical installation check; final coverage quality still depends on donor-signal level, antenna isolation, building loss, cable loss and correct RF design.
APPLICATIONS
Typical R4-LCD Indoor Coverage Applications
Homes and Villas
Indoor coverage improvement where walls, reinforced concrete or building geometry weaken an otherwise usable outdoor signal.
Small and Medium Offices
Meeting rooms, internal corridors and central office areas where voice calls or mobile-data performance is weak.
Shops and Showrooms
Street-level, semi-basement or enclosed commercial spaces where building materials reduce indoor cellular coverage.
Basements and Lower Floors
Areas below ground or on lower levels where usable outdoor operator signal exists but building penetration loss is high.
RELATED STELLA DORADUS PAGES
Indoor Mobile Coverage Resources
Manufacturer reference:
Stella Doradus SOHO Repeater