High level. Proceedings of the National Antenna Annual Conference 20 1 1 reflects the research trends in the domestic antenna field, brings together the latest research results of researchers in this field, and covers many frontier research directions in this field. The author is the antenna branch of the Chinese Institute of Electronics, which is a collection of high-level papers in China. The contents of the proceedings of the National Antenna Conference in 20 1 1 involve antenna theory, microstrip antennas and printed antennas, adaptive array antennas and smart antennas, reconfigurable antennas, phased array antennas, multiband antennas, broadband/ultra-wideband antennas, beamforming and beamforming, frequency selective surfaces, computational electromagnetics, electromagnetic scattering, backscattering and imaging.