Four focal plane arrangements studied in this paper, with different number of horns and different positions in the arrangement. Top left: rectangular. Top right: double-rectangular. Bottom left: triple-rectangular. Bottom right: hexagonal. In the three first arrangements, the hexagonal distribution (structure with the horn) has 249.44 cm as the maximum width and 240 cm as the height. In this structure, the circle represent central position of the horn with 190 cm in diameter. Arrangement four was built with different measures of the hexagonal structures to contain the horns, with 192 cm in maximum width and 190 cm in height. The arrow indicates the Bingo scanning direction in the sky.