High‐performance narrowband superconducting filters with high <i>Q</i> resonators at X‐band

Song, Xiaoke; Wei, Bin; Cao, Bisong; Zhang, Xiaoping; Guo, Xubo; Zhang, Guoyong; Xu, Zhan

doi:10.1002/mop.28381

Cited by 5 publications

(15 citation statements)

References 14 publications

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“…Compared to the coupling coefficients calculated for filter A in Ref. [ ], the strength of crosscoupling between folded UIRRs decreases greatly.…”

Section: Filter Design Fabrication and Measurementsmentioning

confidence: 67%

“…In the published works, the filters in Refs. [11,14,15] work at X-band, the filter in Ref. [16] works at Ku-band, and the filter in Ref.…”

Section: Coupling Chara Cteristic S and T O P O L Og Y E V O L U T mentioning

confidence: 99%

“…Only a few studies have been conducted on resonators and filters working at high frequency bands, such as X‐, Ku‐, K‐, and Ka‐bands. X‐band filters functioning at the frequencies of 8‐12.4 GHz have attracted increasing attention recently . Ryan describes several HTS filters for improved wireless systems at X‐band.…”

Section: Introductionmentioning

confidence: 99%

“…X-band filters functioning at the frequencies of 8-12.4 GHz have attracted increasing attention recently. [7][8][9][10][11][12][13][14][15] Ryan 7 describes several HTS filters for improved wireless systems at X-band. In 1995, a pair of two-pole filters at X-band, one with gold and the other with YBCO thin films, were fabricated and compared.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Analysis and optimization of the unpredictable transmission zero in X-band filter design

Jiang

Wei

Zheng

et al. 2016

Int. J. RF Microw. Comput. Aided Eng.

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This article focuses on the common problem of uncontrollable transmission zero (TZ) in X‐band filter design. Using uniform impedance rectangular resonator (UIRR) to design an X‐band filter always results in an unpredictable TZ on the low‐frequency side of the passband, which greatly deteriorates the frequency selectivity of the filter performance. Electromagnetic coupling polarity analysis of the UIRR shows that the magnetic crosscoupling between nonadjacent resonators which is opposite to the main coupling plays a major role in the unpredictable TZ. By optimizing the UIRR from the loop structure with a small opening to the folded one, weak couplings between resonators are obtained. A high‐temperature superconducting filter at X‐band using folded UIRR resonator was designed and fabricated with a center frequency of 10.01 GHz and a bandwidth of 58 MHz, and the uncontrollable TZ has been removed successfully from the low‐frequency side of passband. The measured insertion loss is less than 0.4 dB and the return loss is greater than 15 dB.

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“…Compared to the coupling coefficients calculated for filter A in Ref. [ ], the strength of crosscoupling between folded UIRRs decreases greatly.…”

Section: Filter Design Fabrication and Measurementsmentioning

confidence: 67%

“…In the published works, the filters in Refs. [11,14,15] work at X-band, the filter in Ref. [16] works at Ku-band, and the filter in Ref.…”

Section: Coupling Chara Cteristic S and T O P O L Og Y E V O L U T mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analysis and optimization of the unpredictable transmission zero in X-band filter design

Jiang

Wei

Zheng

et al. 2016

Int. J. RF Microw. Comput. Aided Eng.

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show abstract

“…However, microwave filter produces parasitic passband at harmonics of pass-band center frequency, so in terms of high sensitivity receivers, this will form interference sources among mobile communications systems [1][2][3]. Thus, wide stopband filters are required to suppress interference among various communication systems [3][4][5][6][7][8][9]. There are three main ways for HTS band-pass filters to reject or shift the highorder parasitic passband: (1) stepped impedance resonators (SIRs), (2) loading interdigital capacitors to complete the passage of high-order parasitic passband (ICRs), (3)S-type spiral resonators [5-10, 12, 13], these conventional methods can shift stop-band range to 2 ∼ 3f 0 .…”

Section: Introductionmentioning

confidence: 99%

HTS Ultra-Wide Stop-Band Band-Pass Filter Based on Quarter-Wavelength Mutually Different Structure Resonators

Zhou

Dang

Yang

et al. 2015

J Supercond Nov Magn

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This paper proposes a method that uses new quarter-wavelength mutually different structure stepped impedance resonators to design a high-temperature superconducting (HTS) ultra-wide stop-band band-pass filter, and suppresses resonance point of stop-band by loading trapping resonators on feed lines. The new quarterwavelength mutually different structure stepped impedance resonators reduces the size of resonators, achieves the miniaturization of high-temperature superconducting filter, broadens the stop-band, and realizes ultra-wide stopband. This four-order high-temperature superconducting filter is designed for the GSM900 system on a two-sided YBCO/LaAlO 3 /YBCO high-temperature superconducting film with a size of 16.5 mm × 8.1 mm, thickness of 0.5 mm, and permittivity of 24. It is measured at 77 K with a result of bandwidth of 25 MHz, insertion loss less than 0.4 dB, and the first parasitic pass-band frequency greater than 5.5 GHz(stop-band is greater than f 0 + BW/2 ∼ 6f 0 ). The measurements coincide with the theoretical calculations and the electromagnetic simulation greatly.

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A superconducting manifold‐coupled triplexer with an iterative design method at X‐band

Song

Liu

Wei

et al. 2016

Micro & Optical Tech Letters

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This paper presents a superconducting manifold‐coupled narrowband triplexer at X‐band frequency. The high Q‐value resonator is adopted to create a filter with low insertion loss. Impedance matching and iterative design methods are used to design the duplexer and manifold structure. Furthermore, metal shielding plates are used to separate the three channels to suppress the box resonant modes. The three bandwidths of the superconducting triplexer are all 60 MHz, and the center frequencies are 9.0, 9.12, and 9.24 GHz. The triplexer exhibits good performance at 65 K, with an insertion loss of 0.7 dB at 9.24 GHz. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2949–2954, 2016

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High‐performance narrowband superconducting filters with high Q resonators at X‐band

Cited by 5 publications

References 14 publications

Analysis and optimization of the unpredictable transmission zero in X-band filter design

Analysis and optimization of the unpredictable transmission zero in X-band filter design

HTS Ultra-Wide Stop-Band Band-Pass Filter Based on Quarter-Wavelength Mutually Different Structure Resonators

A superconducting manifold‐coupled triplexer with an iterative design method at X‐band

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