Compact superconducting lowpass filter with wide stopband. Issue 14 (1st July 2017)

• Record Type: Journal Article
• Authors: Jiang, Ying; Wei, Bin; Heng, Yong; Guo, Xubo; Cao, Bisong; Jiang, Linan
• Is Part Of: Electronics letters. Volume 53:Issue 14(2017)
• Page Start: 931
• Page End: 933
• Publication Date: 2017-07-01
• Subjects: low‐pass filters -- superconducting filters -- band‐stop filters -- UHF filters -- magnesium compounds -- superconducting transmission lines; compact superconducting lowpass filter -- wide stopband filter -- compact superconducting LPF -- symmetrical parallel coupled lines -- cross‐shaped patch -- modified E‐type feeding structure -- MgO substrate -- insertion loss; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2017.0429
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : A compact superconducting lowpass filter (LPF) composed of a pair of symmetrical parallel coupled lines, a cross‐shaped patch and a modified E‐type feeding structure is proposed. The filter is successfully designed and fabricated on MgO substrate with a compact size of 10.0 × 15.0 mm. Measured results match well with simulation results. The LPF has a 3 dB cut‐off frequency of 2.18 GHz, relative stopband bandwidth of 160%, and 0.06 dB insertion loss in the passband. For attenuation level of −18.5 dB, stopband bandwidth is from 3.16 to 19.25 GHz.