The device has passed various tests and have a certification related to use in civil defence shelters.

Ensuring communication in the shelters for staying in touch with rescue authorities, send emergency messages, and receive instructions.

Energy self-sufficiency doesn't require electricity and can work in situations when the power grid is not available.

Here is short description how it works:
A passive antenna system operates without any power supply or active electronics. It consists of an external antenna and an internal antenna connected by a coaxial cable. The external antenna receives available radio and mobile signals, which are naturally transferred through the cable to the internal antenna. The internal antenna then reproduces these signals inside the shelter or building.
Because the system is fully passive, signal transmission is instantaneous and highly reliable, but signal strength decreases with distance from the internal antenna. Regional network compatibility and supported frequency bands should always be verified to ensure proper performance.

Passive Repeater Brings Coverage to Civil Defence Shelters & Hardened Facilities

The passive repeater provides coverage to the civil defence system even in peacetime. The passive repeater, installed in the civil defence system and designed and manufactured for use in times of crisis, is intended to be used during a sheltering situation. With the help of a passive repeater, we maintain contact with those outside the civil protection shelter and receive necessary instructions from authorities, including on various situations in which the civil protection shelter can be used, such as filtering, blocking or bypassing, and their duration. It is therefore advisable to equip civil defence shelters with a passive antenna.

Model / Specifications: VSS-5G-SAS-1-SMAN

Electrical Specifications

Gain: > 6 dBi / > 9 dBi / 6 dBi

VSWR: ≤ 2.0

Polarization: 65°

Horizontal Beamwidth: > 12°

Vertical Beamwidth: 55°

Input Impedance: 50 Ω

Maximum Power: 100 W

Lightning Protection: DC Ground

Connector: SMA Female (1 m cable)

Mechanical Specifications

Mounting Type: Wall

Dimensions (internal unit): 165 × 155 × 50 mm

Weight: 0.3 kg

Reflector Material: Copper

Radome Material: ABS

Radome Color: White

Environmental Conditions

Relative Humidity: Up to 100%

Operating Temperature: -40°C to +60°C

Note: Specifications refer only to the internal antenna unit. An additional external antenna and connecting cable are required for full system operation.