Johansen was born in 1960 in the small holiday and fishing village Agger in the
Thy district, which is located in the northwestern part of
Jutland in
Denmark. He graduated from high school in
Thisted in 1980. He subsequently studied Technical Physics (Engineering) at
Aalborg University and holds a master's degree within this particular field which he was awarded in 1986. In addition to his master's degree he also holds a
PhD (awarded in 1989) and a title of
Doctor of Science in
physics (awarded in 2001). == Academic career ==