An exemplary antenna wire termination assembly includes a helically shaped conductive retention coil and a conductive tab member. The retention coil has a first end and a second end that define a length of the retention coil, a plurality of turns between the first and second ends, and a flat side along the length of the retention coil. The flat side is formed by a plurality of aligned straight segments included in the turns. The conductive tab member has a proximal portion conductively affixed to the flat side of the retention coil and a distal portion extending away from the second end of the retention coil in a direction that is parallel with the length of the retention coil.