who can tell me the differance between ads and designer

as far as si ,the two software both have its advantages (circuit ) but i still can not get which will be better to desige a rf circuit ?any one who have the understanding please tell me

没有用过designer，呵呵，期待中

ADS在电路仿真的功能十分强大，而且系统级仿真的分析工具也十分使用，
并且有数字模拟混合仿真的强大功能。
相对来说，Designer使用的人数较少，但我认为在仿真滤波器等耦合结构时，由于二维电磁场算法的准确性和与HFSS的良好接口，Designer要占优势

个人感觉还是用ADS软件要多一些。