Design of Ultra-wide Band-pass Filter Based on Metamaterials Applicable to Microwave Photonics
- Authors
- Lee, Chongmin; Shim, Wooseok; Moon, Yong; Seo, Chulhun
- Issue Date
- Sep-2012
- Publisher
- OPTICAL SOC KOREA
- Keywords
- Ultra wide band; Band pass filter; Metamaterial; Unwrapped phase; Group delay
- Citation
- JOURNAL OF THE OPTICAL SOCIETY OF KOREA, v.16, no.3, pp.288 - 291
- Journal Title
- JOURNAL OF THE OPTICAL SOCIETY OF KOREA
- Volume
- 16
- Number
- 3
- Start Page
- 288
- End Page
- 291
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/12354
- DOI
- 10.3807/JOSK.2012.16.3.288
- ISSN
- 1226-4776
- Abstract
- We designed an ultra-wide band-pass filter applicable to microwave reflectometry for KSTAR (Korea Superconducting Tokamak Advanced Research) and to microwave photonics. The proposed ultra-wide band-pass filter exhibits a metamaterial structure characterized by a wide band, low insertion loss, and high skirt selectivity. The proposed filter is applied to enhance the linearity of reflectometry at the output of a VCO (voltage controlled oscillator). The pass-band of the proposed filter is observed at 18 similar to 28 GHz, and the out-of-band rejection is below 20 dB. Further, we constructed an unwrapped negative phase of S(2, 1) to verify the characteristics of the metamaterial. The under- and upper-band at lower limits of the pass-band are left- and right-handed, respectively. The group delay of the filter is less than 0.5 ns.
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