仿真矩形貼片天線遇到的問題

the first mode at inhomogeneous port 1 is hybrid 。this could lead to an inaccurate energy balance。please check your structure。
CST仿真微帶矩形貼片天線時遇到這個問題，是怎么回事？怎么改正呢？

Check if your structure is overlapped near port area.