A module feeder system is disclosed. A heat-sensitive adhesive sheet is conveyed between a thermal head for generating heat and a platen roller by rotating the platen roller against the thermal head to thermally activate the heat-sensitive adhesive sheet. In bore hole applications, data bandwidth between a down hole device and the surface can be limited, while determining water hold-up based on down hole measurements can be data intensive. A coil spring is formed in the middle of the internal lead wire. By these means, the geometrical shapes of the antenna are changed to improve the radiating efficiency of the antenna. The apparatus also has a dispersion element configured such that one or more radiation beams of the first group are incident on the dispersion element at a different angle from the one or more radiation beams of the second group and such that the one or more radiation beams of the first and second group output from the dispersion element are substantially parallel.