School of Electronic Science and Engineering;
Nanjing University of Posts and Telecommunications;
Nanjing 210023;
China;
State Key Laboratory of Millimeter Waves;
Southeast University;
Nanjing 210096;
China;
China Electronic Technology Group Corporation Fourteenth Research Institute;
Nanjing 210039;
China;
microwave lens antenna; Huygens’ principle; metasurface; low-profile;