Re: It all seems a bit far fetched, to me
>1. As far as I'm aware, applying a force to an obect in orbit, merely changes the orbit of that object. It does not "knock it out of orbit" A satellite launch comprises two burns, The first to get it to the right height, and the second to impart the required velocity that it has to have to orbit at that height.
So, by your own words, taking velocity back out must surely preclude it from orbiting at that height.
Bear in mind that taking velocity out of a circular orbit (One which is equal in altitude at all points) does not result in a circular orbit, it lowers the point on the opposite side of the current position.
>3. The de-orbiter is essentially linked to the object, and without extra expenditure of fuel and mass will simply follow the object down to a matching fate
It is in no way linked to the object being de-orbited, how did you get that idea?
It imparts deceleration to the object, so it lowers one side of it's orbit until it intersects the atmo.
The craft doing the imparting has beams firing both ways, so it does not alter it's own orbit.