[单选题]Simulation and experimental studies ____, which show that the axial ratio bandwidth of the antenna is directly proportional to the thickness of the substrate.rXv答案窝(daanwo.com)-大学生作业答案及考资分享平台
Ahave been performedrXv答案窝(daanwo.com)-大学生作业答案及考资分享平台
Bis performedrXv答案窝(daanwo.com)-大学生作业答案及考资分享平台
Cwas performedrXv答案窝(daanwo.com)-大学生作业答案及考资分享平台
Dwere performed