High-order superconducting filter with group delay equalization

McErlean, E.P.; Karyamapudi, B.

doi:10.1109/mwsym.2005.1516968

Cited by 15 publications

(6 citation statements)

References 8 publications

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“…The other way to flatten the in-band group delay is to employ imaginary frequency transmission zeros (positive cross couplings) in filter network synthesis. Hong et al [20] have designed an 18-pole HTS bandpass filter with group delay self-equalization. The filter was designed to have a 15 MHz pass band at a center frequency of 1967.5 MHz.…”

Section: In-band Group Delaymentioning

confidence: 99%

Progress on applications of high temperature superconducting microwave filters

Li¹,

Xu²,

Wang³

et al. 2017

Supercond. Sci. Technol.

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In the past two decades, various kinds of high performance high temperature superconducting (HTS) filters have been constructed and the HTS filters and their front-end subsystems have been successfully applied in many fields. The HTS filters with small insertion loss, narrow bandwidth, flat in-band group delay, deep out-of-band rejection, and steep skirt slope are reviewed. Novel HTS filter design technologies, including those in high power handling filters, multiband filters and frequency tunable filters, are reviewed, as well as the all-HTS integrated front-end receivers. The successful applications to various civilian fields, such as mobile communication, radar, deep space detection, and satellite technology, are also reviewed.

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Section: In-band Group Delaymentioning

confidence: 99%

Progress on applications of high temperature superconducting microwave filters

Li¹,

Xu²,

Wang³

et al. 2017

Supercond. Sci. Technol.

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“…In recent years, various kinds of HTS filters with excellent performances have been constructed successfully [14]. Many highly selective filters [1,2,6,15,16] have been developed with more than 20 poles. But high order filters usually have a high center frequency and have little influence on the adjacent channel.…”

Section: Introductionmentioning

confidence: 99%

A 15-pole high temperature superconductor filter for radar applications

Wang

2018

Supercond. Sci. Technol.

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This paper presents a compact and high first harmonic frequency resonator. The characteristics of this resonator are theoretically analyzed. A highly selective 15-pole Chebyshev high temperature superconducting ultra-high frequency narrowband filter for radar applications was fabricated by using this resonator. The filter has a center frequency of 495MHz and a fractional bandwidth of 1%. The first harmonic frequency is more than 3.3 times the fundamental frequency. The measured filter shows excellent selectivity, better than 85 dB/1 MHz skirt slopes, and more than 85 dB of rejection at 497.5 MHz from the band edge. The filter was fabricated on a 2 inch YBCO thin film with a 0.5 mm thick MgO substrate. The experimental results are consistent with the simulations.

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“…So they should be modified with phase correction if used in some high-capacity system with special distortion demand. Recently, self-equalization technology and external equalization technology are usually used to realize linear phase quasi-elliptic filters [1][2][3][4][5][6][7][8][9][10]. High temperature superconductor (HTSC) filter has extreme low insertion loss, which is especially much more outstanding in high-order filter compared with conventional-metal filter.…”

Section: Introductionmentioning

confidence: 99%

“…High temperature superconductor (HTSC) filter has extreme low insertion loss, which is especially much more outstanding in high-order filter compared with conventional-metal filter. In recent years, with the decreasing cost of HTSC filter's fabrication, HTSC filter has been extensively used in the communication system [5][6][7][8][9][10][11][12][13][14][15][16]. At the same time, with the rapid development of communication system, higher standards for the selectivity and equal group delay characteristic (linear phase characteristic) of filter are put forward.…”

Section: Introductionmentioning

confidence: 99%

HTSC Cascaded Linear-Phase Filter with Quasi-Elliptic Response

Zhang

Yang

Ren

et al. 2014

AMM

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In view of the difficulty of designing a high-order linear phase filter with prototype parameters directly, this paper proposes a new approach to rapidly construct a high order linear phase filter through cascading two same low-order linear phase filters. A twelve-order HTSC cascaded linear phase filter is fabricated on YBCO/LaAlO3/YBCO substrate with the dimension of 44.1mm ×31.4mm. The measured result shows that the filter has a 56 MHz passband at a center frequency of 1993 MHz. The minimum insertion loss in the passband is 0.59 dB. The group delay variation in passband is less than 5 ns over 78.5% of the filter bandwidth which is in good agree with the simulation result.

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High-order superconducting filter with group delay equalization

Cited by 15 publications

References 8 publications

Progress on applications of high temperature superconducting microwave filters

Progress on applications of high temperature superconducting microwave filters

A 15-pole high temperature superconductor filter for radar applications

HTSC Cascaded Linear-Phase Filter with Quasi-Elliptic Response

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