Market commentators had suggested Rakon's gain may have been a delayed reaction to an update issued by the company last month.
Rakon's revenue in the first half to September 30 improved to $59.5m from $56.9m in the previous corresponding period, while its net profit came to $4.6m from $1.3m.
"In the second half of the current year, with ongoing economic uncertainty from geopolitical tensions and Covid-19, 5G roll-out has slowed but recent activity indicates demand improving," the company said in last month's update.
Rakon designs and makes advanced frequency control and timing solutions.
Its three core markets are telecommunications, global positioning and space and defence.
Over the last 12 months, Rakon's share price has rallied by 45c or 166 per cent.