Composite antenna for electronic article surveillance systems
作者： Richard Alan Shandelman , Phillip Joseph Lizzi
DOI:
关键词: Halo antenna 、 Current (fluid) 、 Electronic article 、 Antenna (radio) 、 Engineering 、 Loop (topology) 、 Electrical engineering 、 Electronic engineering 、 Composite number
摘要: A composite antenna system for an article surveillance system, in which a plurality of differently-phased loop antennas are supplied with different currents to provide desired positioning peaks and nulls the near-field strength, produce near-zero far-field as desired. In one preferred form, smaller is placed near floor larger above it, lower correspondingly higher-intensity current enhanced strength floor, while still maintaining cancellation.
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