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A novel compact electromagnetic-bandgap (EBG) structure and its applications for microwave circuits

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5 Author(s)
Li Yang ; State Key Lab. on Microwave & Digital Commun., Tsinghua Univ., Beijing, China ; Mingyan Fan ; Fanglu Chen ; Jingzhao She
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A novel electromagnetic-bandgap (EBG) structure in a fork-like shape is investigated. This structure has an extremely compact size. A comparison has been carried out between the new structure and the conventional mushroom-like EBG structure. Simulations and experimental results have verified that the area of the fork-like structure is less than 40% of the latter. The presented structure also provides an additional degree of freedom to adjust the bandgap position, which is applied to design a novel reconfigurable multiband EBG structure. Several application examples have been demonstrated, including a double-element microstrip antenna array with low mutual coupling, notch-type antenna duplexer, and steerable array with a linearly discrete beamsteering of 20° in steps of 10° at 2.468 GHz.

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:53 ,  Issue: 1 )