Mohammed Zaman, 32, from Wimborne Gardens, Reading, Berkshire, pleaded guilty at Winchester Crown Court to causing the death of Macaully (Mac) Sutcliffe, from Applegate, St Mary Bourne, Hampshire.
Zaman's van was involved in a collsiion with the 16-year-old's moped at the junction of Bloswood Lane and Harroway, near Whitchurch, on October 14 last year.
Rev Richard Sutcliffe, assistant benefice priest at St Mary Bourne, said in a statement: "No court sentence can help to fill the gap that is left following the death of our son, Mac.
"As well as missing his presence now, we have huge regrets for his future that was so cruelly cut short."
Rev Sutcliffe went on to pay tribute to the "fine young man that he had become" saying he touched many people and he will be dreadfully missed.
He also thanked people for their support at what he called "this difficult time."
The court heard Zaman had ignored give way signs on his approach to the junction, even though they had also been highlighted on his sat nav.
Hampshire Police said in a statement: "He had seen the moped was indicating but told police in interview he had misinterpreted the direction of the indication."
During sentencing, the judge praised the 16-year-old victim's exemplary riding and said all the fault for the collision lay with Zaman.
As well as the 20-month custodial sentence, Zaman had his licence endorsed and he was banned from driving for two years and 10 months with a requirement to carry out a retest.