just a guess

Yours Mike Harold

This is just a guess, since "entfalten" literally means opening/unfolding. Probably this might help you get somewhere near to the answer.

The correct term for entfalten is indeed unfold. Both "unfolding technique" and "unfolding method" are used.

See
satellite's 30-feet diameter umbrella-shaped antenna would unfold properly in a space vacuum. The antenna is in ...
grin.hq.nasa.gov/ABSTRACTS/GPN-2000-001264.html

the geometry of the antenna's movement while allowing ... can fold and unfold smoothly and continuously ...
www.jidpo.or.jp/idsa/design/index-e.html

needed to fold and unfold the structure like a ... 30 helix antennas on each satellite is mounted on the ...
www.ksc.nasa.gov/shuttle/technology/sts-newsref/sts-jsc-com...

forth.aero.cst.nihon-u.ac.jp/USSS/
and many related sites.