UHF Products

Mining & Tunnel Communication:

We are world leaders in Leaky Feeder Technology. We are constantly designing and engineering new technology and products for Leaky Feeder integration.

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The Power Supply consists of a Mains to DC power converter/charger and a heavy duty standby battery. The unit has been designed to supply the requirements of the Sigma range of ...

The UHF Area Coverage Amplifier provides a wide area coverage solution to above ground communication extensions of the existing Leaky Feeder system. The provision of increased RF ...

The Double Branch Coupler is a passive signal splitter that is used to branch of the main Leaky Feeder arterial to link into a side tunnel. The Double Branch Coupler is configured ...

UHF Head End Combiner is the core of the Sigma Leaky Feeder system. The unit combines multiple radio channels on the surface and underground into one single voice and data network.

The Line Splice is a 50 Ohm impedance line splice designed for joining 50 Ohm Leaky Feeder cable with minimal loss and excellent impedance matching. No components are used in the ...

The UHF Line Termination Unit is a 50 Ohm impedance unit that terminates the Leakey Feeder in a matched impedance unit. The impedance match is AC coupled so there is no DC power ...

The UHF Mini Line Amplifier UMLAD from Sigma is the industry standard UHF Amplifier for Leaky Feeder Systems. It has been used for many years by hundreds of customers world-wide. ...

The Power Coupler is a 50 Ohm UHF Power Coupler is designed to allow for the coupling of DC power into the leaky feeder cable to power the bi-directional amplifiers in the ...

The UHF Power Coupler and DC-DC Isolator is a 50 Ohm UHF Power Coupler combined with a DC-DC Isolator that is designed to allow for the coupling of DC power into the leaky feeder ...

The Refuge Bay Radio was developed to be utilized in areas allocated as places of refuge within the mine. The Refuge Bay Radio allows communication on a pre-set frequency into the ...

The Single Branch Coupler is a passive signal splitter that is used to branch of the main Leaky Feeder arterial to link into a side tunnel. The Single Branch Coupler is configured ...

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