Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9841896 | Physica C: Superconductivity and its Applications | 2005 | 5 Pages |
Abstract
The power handling capability of high temperature superconducting (HTS) filters is limited due to current concentration at the edges of the superconducting films. This problem can be overcome by using ring resonator, which employs the edge current free and reduces the current concentration. However, this kind of filter has large size. In order to reduce the cost and size and increase the power handling capability, in this paper a HTS photonic bandgap (PBG) structure filter is developed. The proposed pass band filter with PBG structure exhibits center frequency 12.23Â GHz, steepness (about 35Â dB/GHz), bandwidth (â3Â dB bandwidth is 0.045Â GHz), and low insertion loss (about â0.5Â dB), and can handle input power up to 1Â W (this value was limited by the measurement instrument used in the experiment). The size is reduced by 25%, insertion loss reduced by 37.5%, and steeper roll-off of the filter is also obtained compared with that in published literature.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Hui-Fen Huang, Jun-Fa Mao, Zhi-Hua Luo,