How could melee weapons be improved by modern technology?

Today, weapons technology has turned armor from near invincibility to a layer that just prevents you from dying instantly. read more

Since you specifically mention melee weapons, then projectiles and armor are not being considered, but still one could imagine that blunt or spearing weapons could be improved with modern mechanisms. For example, imagine a spear with a (spring or pneumatic air) compressed shaft, so upon contact the tip is further extended into the target. read more

If it were a modern opponent using a melee weapon against a knight or medieval warrior trained in the use of melee weapons since presumably the early teens, the warrior from a past era would almost always prevail. read more

The primary reason melee weapons are not used in modern warfare is range. In the time it takes a sword wielding combatant to close the distance to a rifle wielding combatant, the rifleman has shot the swordsman multiple times. read more