Since the main beam can be pointed almost instanteously, it can jump from object to object as they come into range.
Phased-array radars are not without disadvantages. Most are functional through a cone of just 120 degrees, because the width of the main beam diminishes the farther it gets from broadside. As an example, think of how narrow your wide-screen television looks when you’re in an adjacent room.
For this reason, at least four radars are needed to cover a hemisphere. To compensate for the narrow field of view, the SBX’s main array rotates and tilts; it’s one of the few phased arrays to do that.
Although the initial cost is 100,000 times more expensive than a conventional radar with the same beam width, a phased-array device may be cheaper long-term because the system will still function as needed even if many of its smallest components fail.