Okay, this has gone on far enough.
The actual reason for the OP's question is this: The producers of First Contact considered such a detail a triviality and not worth worrying about for their big movie. And, you know what, they were right in that regard.
It's tempting to forget that most of us in Trek Tech simply do not operate at the Hollywood level. Most of us here (except that one guy - you know who I'm talking about!) are simply more versed and educated about technology and science than the typical Hollywood writer or producer. Yet, even knowing this, we (as a group) for some reason can't accept the simple following phrase:
"Hollywood fucked this up."
Instead we engage in hateful, spiteful arguments on just how we explain the bullshit in some way where it no longer appears to be bullshit to us. It's well beyond an amusing intellectual exercise, but gone into fervor and dogma. Were someone has to be right on an interpretation of science which was pointedly wrong in the first place.
The bussards on the Phoenix? No, they really shouldn't be there. That little probe ain't collecting anti-matter, and that's a minor problem with a seriously flawed story. And, really, most of Paramount or CBS's audience (including a lot of die-hard Trek fans) really wouldn't care about it.
But for us, here, we need an enema of basic fact. "Hollywood fucked this up." This has been a truism since "Dilithium Circuits" were brought up and the bridge was rotated away from the external model's design. At some point, everyone needs to do themselves a favor, move on, and try to enjoy the ride again.