achieved by modifying the procedure to determine the position of a primarily selected antenna and then the tilt angle of the antenna is adjusted in a direction in which the interference is expected to occur if a setting height and a standard requirement of the selected antenna are determined fig1 is a flow chart illustrating a method for determining the position of a wireless communication antenna in accordance with a preferred embodiment of the present invention a person attempting to determine a prime position of the wireless communication antenna needs a floor plan of the building in which the antenna is to be positioned in step 110 at least two horizontal lines are drawn on the floor plan of the building a greater number of horizontal lines will increases the accuracy of the method after drawing the horizontal lines the process proceeds to step 102 where intersecting points between the horizontal lines and walls of the building are determined a detailed explanation of this process will be given with reference to fig2 which is a floor plan of a large apartment used for explaining the preferred embodiment of the present invention as shown in fig2 two horizontal lines 201 and 203 are drawn in accordance with step 100 of fig1 which is the minimum required number considering a horizontal line 201 there are 4 intersecting points between the horizontal line 201 and the walls as indicated by reference numerals 211 212 213 and 214 after this a point designated by reference numeral 220 is marked at a center between two intersecting points designated by reference numerals 212 and 213 next in step 102 a vertical line with respect to the marked central point 220 is drawn as indicated by reference numeral 221 similarly there are 3 intersecting points between the.