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題 名 | Design of a Miniatured Planar Dual-Band Filter Using Embedded Metamaterial Resonators (EMRs)=使用嵌入式超穎材料共振器設計具微小化平面式雙頻帶通濾波器 |
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作 者 | 周東甲; 陳居毓; | 書刊名 | International Journal of Science and Engineering |
卷 期 | 2:1 2012.03[民101.03] |
頁 次 | 頁19-22 |
分類號 | 448.5 |
關鍵詞 | 嵌入式超穎材料; 共振器; 雙頻帶通濾波器; Composite right left-handed; CRLH; Transmission lines; TLs; Dual feeding structure; Embedded resonator; Bandpass filters; BPF; |
語 文 | 英文(English) |
英文摘要 | A novel dual band filter has been proposed. It is shown that the two transmission bands can be excited and designed using proposed resonators which combine an open-loop resonator and the composite right/left-handed (CRLH) material structure. The CRLH material structure is embedded into the ends of the folded open-loop resonators. The open-loop resonator can excite the low-band resonant frequency and the circuit which is designed to be unbalanced, a left handed (LH) mode in the β-ω diagram can control the high-band resonant frequency. With dual-feeding structures added, the performances of the filter such as frequency selectivity and insertion loss are much improved. Besides, the embedded resonators structure (EMRs) can further miniaturize the dimensions of the overall structure. Finally, a novel dual band filter based on the 0° feeding structure has been designed and fabricated with 2.4 and 1.1 dB insertion loss at the center frequency of 2.45 and 5.2 GHz. Experimental circuits on substrates with εr =3.38 are measured to validate the theory and design. The die size of the scheme is 10 mm × 8.55 mm. |
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