The telecommunications spectrum provider has now raised $120m altogether, SBA Communications and American Tower contributing to its latest round.

US-based phone spectrum-sharing technology producer Federated Wireless secured $51m yesterday in a series C round that included telecommunications mast operators SBA Communications and American Tower.

Singaporean sovereign wealth fund GIC also took part in the round, together with commercialisation firm Allied Minds and an entity called Pennant Investors.

Founded in 2012 by Allied Minds to exploit Virginia Tech research, Federated Wireless markets shared-spectrum technology that allows mobile network operators, governments and private enterprises to harness its telecoms band without impairing…