But these gains were undermined by the New Zealand dollar averaging 81 US cents through the latest six months, 10 cents higher than in the previous first half.
"The prolonged strength of the New Zealand dollar is a problem not only for Rakon but for all New Zealand exporters and manufacturers," he said.
Robinson said the economic environment is challenging but he reaffirmed previous guidance that full-year EBITDA will be between $14 million and $18 million.
"The global economic environment is seeing our telecommunications customers, in particular, reduce recent and current demand below prior rates and forecasts as they reduce inventory levels," he said.
"We have and will continue to tune our business to respond. We have recently reduced indirect costs in a number of areas in a manner that we do not consider will impact on our ability to achieve our long-term goals."
Japan's earthquake's impact on the overall supply chain and the European economic uncertainty negatively impacted earnings. However, the proliferation of smart wireless devices, which is expected to grow, is putting substantial pressure on telecommunications network capacity which is expected to increase demand for Rakon's products.
The August 2010 acquisition of the Temex business led to increased sales to the space and defence industries. "This is a sector where we expect to continue to realise steady, sustainable and profitable growth," Robinson said.
The acquisition had been targeted to increase Rakon's French business's product range and the aggregate French business reached breakeven in the first half, he said.
Rakon shares reached their previous record low at 62 cents in the depths of the global financial crisis in March 2009. They have fallen from $1.29 in January.