disclosed herein are a method and divider for dividing power between and supplying the parts of the power to respective radiation elements of an array antenna , and an antenna device using the divider . the division method includes the steps of dividing power , applied to a feeding unit , into two parts at a first stage of division , and supplying a first of the two parts to at least one central radiation element , and dividing a second of the two parts and supplying sub - parts of the second part to respective peripheral radiation elements , thereby supplying relatively high power to the central radiation element and relatively low power to the peripheral radiation elements .