Microstrip lowpass filter based on split ring and complementary split ring resonators

2012 ◽  
Vol 54 (7) ◽  
pp. 1723-1726 ◽  
Author(s):  
Yang Yang ◽  
Xi Zhu ◽  
Nemai C. Karmakar
Keyword(s):  
Ring Resonators ◽  
Lowpass Filter ◽  
Split Ring ◽  
Split Ring Resonators

scholarly journals Terahertz sensor with resonance enhancement based on square split-ring resonators

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Zhonggang Xiong ◽  
Liping Shang ◽  
Jieping Yang ◽  
Linyu Chen ◽  
Jin Guo ◽  
...  
Keyword(s):  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Resonance Enhancement

scholarly journals Passively Tunable Terahertz Filters Using Liquid Crystal Cells Coated with Metamaterials

Coatings ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 381
Author(s):  
Wei-Fan Chiang ◽  
Yu-Yun Lu ◽  
Yin-Pei Chen ◽  
Xin-Yu Lin ◽  
Tsong-Shin Lim ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Ring Resonators ◽  
Maximum Frequency ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Terahertz Region ◽  
Resonance Frequencies ◽  
Terahertz Communication ◽  
Terahertz Sensing ◽  
Crystal Cells

Liquid crystal (LC) cells that are coated with metamaterials are fabricated in this work. The LC directors in the cells are aligned by rubbed polyimide layers, and make angles θ of 0°, 45°, and 90° with respect to the gaps of the split-ring resonators (SRRs) of the metamaterials. Experimental results display that the resonance frequencies of the metamaterials in these cells increase with an increase in θ, and the cells have a maximum frequency shifting region of 18 GHz. Simulated results reveal that the increase in the resonance frequencies arises from the birefringence of the LC, and the LC has a birefringence of 0.15 in the terahertz region. The resonance frequencies of the metamaterials are shifted by the rubbing directions of the polyimide layers, so the LC cells coated with the metamaterials are passively tunable terahertz filters. The passively tunable terahertz filters exhibit promising applications on terahertz communication, terahertz sensing, and terahertz imaging.

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