Yes, with a directional antennae you yourself have to find the direction. If you look at the signal strength that would indicate a rough distance.
If you only have an omni-directional antennae (like most wifi cards do) you need to draw a circle around it. Signal strength should be equivalent to the radius of that circle (stronger incoming signal = smaller radius). That still doesn't tell you where someone is. A second omni-directional antennae somewhere else can pick up the same signal. Where these 2 circles intersect is a possible location. Still leaves you with 2 possibilities so you need a 3rd omni-directional antennae. Where these 3 circles intersect is the location.
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