A NOVEL DUAL MATERIAL BIONIC FLEXIBLE LOGO ANTENNA WITH EBG STRUCTURE

Based on the principle of bionics, this paper combines the design of flexible bionic antenna with Chinese culture and proposes a dual-material bionic antenna with Electromagnetic Band Gap (EBG) structure. The antenna uses a polyimide flexible substrate. Radiation patch of this antenna is shaped like a "pear flower", and the "CHINA" shaped slot is etched on the ground to form a Logo mark. In order to reduce the impact of antenna radiation on human body, the introduction of an EBG structure made of Polydimethylsiloxane (PDMS) material makes the front-to-back ratio of the antenna radiation significantly increased. The antenna was bent in different ways and placed on human body model for simulation and testing. The results showed that the antenna achieved an impedance bandwidth of 18.8% (2.22-2.46 GHz), peak gain of 4.02 dBi, and the antenna was low sensitive to deformation, which makes it suitable for modern flexible electronic equipment. From the perspective of bionics, the antenna has good radiation and wearable type, and the beautiful pattern improves the viewing ability of the antenna and people's willingness to wear the wearable antenna, which provides a new design idea for the future design of wearable devices.