New advances in HTS microstrip filter design

Ye, Shen; Sans, C.

doi:10.1109/mwsym.2003.1210525

Cited by 10 publications

(2 citation statements)

References 6 publications

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“…With the rapid development of HTS materials, HTS filters have been attractive for mobile communication applications [1][2][3][4].The filters enjoy much higher selectivity on desired signals to reduce the interference of the intermodulation products from adjacent channels and have much lower noise figure to increase the ability of detecting weak signals.…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Superconducting Linear Phase Filter for WCDMA Communication System

2013

AMR

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This paper represents a high-temperature superconducting (HTS) linear phase filter with self-equalization for WCDMA communication system. of the filter have been presented. The principle, equivalent model, theoretical result, coupling matrix, and the simulated result have been presented. The desired filter with 12-pole and 2 cross couplings has a center frequency of 1950 MHz. The measurement results show that the response of practical filters is in good agreement with that of simulated results and theoretical analysis, the group delay variation is less than ±10 ns over 75% of the filter bandwidth.

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Section: Introductionmentioning

confidence: 99%

High-Temperature Superconducting Linear Phase Filter for WCDMA Communication System

2013

AMR

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“…A lot of high-performance superconducting filter subsystems based on high-temperature superconducting (HTS) thin-film technologies have been developed for mobile, radar and satellite communication applications in recent years. However, only very few of them were contributed to ultranarrow bandpass filters [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

A high-performance ultra-narrow bandpass HTS filter and its application in a wind-profiler radar system

Zhang

Meng

et al. 2006

Supercond. Sci. Technol.

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This paper reports a recent development of a narrowband high-temperature superconducting (HTS) bandpass filter with a fractional bandwidth of 0.35% in the L band. The filter exhibits a 10-pole quasi-elliptic function response implemented with a cascaded quadruplet coupling structure. The measured filter shows a midband insertion loss of 0.26 dB and a return loss better than −15 dB over the passband. Steep rejection slopes are obtained at the band edges and the measured skirt slope has exceeded 120 dB MHz −1 , resulting in an excellent out-of-band rejection very close to the band-edge. Combining this filter together with a special designed low-noise amplifier (LNA) as well as a cryo-cooler, an HTS subsystem was then constructed and mounted in the front end of a wind-profiler radar system, substituting the corresponding conventional parts. A field trial has shown that the HTS filter could markedly improve the sensitivity as well as the anti-interference capability of a wind-profiler radar system.

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Compact ultra-narrowband superconducting filter using N-spiral resonator with open-loop secondary coupling structure*

Lin¹,

Wei²,

Guo³

et al. 2020

Chinese Phys. B

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A novel N-spiral resonator with open-loop secondary coupling structure (OLSCS) is proposed to realize a compact ultra-narrowband high temperature superconducting (HTS) filter. The coupling strength and polarity between the resonators can be significantly reduced and changed by introducing OLSCS, thus the required weak coupling can be achieved in a very compact size. A six-pole superconducting filter at 1701 MHz with a fractional bandwidth of 0.19% is designed to validate this method. The filter is fabricated on MgO substrate with a compact size of 15 mm × 10 mm. The measured insertion loss is 0.79 dB, and the return loss is better than 17.4 dB. The experimental results show a good agreement with the simulations.

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New advances in HTS microstrip filter design

Cited by 10 publications

References 6 publications

High-Temperature Superconducting Linear Phase Filter for WCDMA Communication System

High-Temperature Superconducting Linear Phase Filter for WCDMA Communication System

A high-performance ultra-narrow bandpass HTS filter and its application in a wind-profiler radar system

Compact ultra-narrowband superconducting filter using N-spiral resonator with open-loop secondary coupling structure*

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