HTS Narrow Band Filters at UHF Band for Radio Astronomy Applications

Jiafeng Zhou; Michael Lancaster; Frederick Huang; N Roddis; D Glynn

doi:10.1109/TASC.2005.850170

HTS Narrow Band Filters at UHF Band for Radio Astronomy Applications

Jiafeng Zhou, Michael Lancaster, Frederick Huang, N Roddis, D Glynn

Electronic, Electrical and Systems Engineering

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

High performance narrow-band High-Temperature Superconductor (HTS) filters at 610 MHz with very sharp cut-off response and low loss are needed for improving the observation of pulsars at the Jodrell Bank Observatory, UK. An eight-pole quasi-elliptic HTS filter using compact resonators has been designed for this purpose. The measured response of filter has an insertion loss of 0.3 dB (including a 0.2 dB ripple), and a return loss of 15 dB in the passband. Two transmission zeroes are realized to improve the steepness of the cut-off. The lowest harmonic is designed to appear at 1.79 GHz, about three times the center frequency. The out-of-band rejection is better than 85 dB up to this harmonic. The filter has been tested in the observatory with excellent results.

Original language	English
Pages (from-to)	1004-1007
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	15
Issue number	2
DOIs	https://doi.org/10.1109/TASC.2005.850170
Publication status	Published - 1 Jun 2005

Keywords

high-temperature superconductors
microwave filters
superconducting filters
astronomy

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10.1109/TASC.2005.850170

Cite this

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abstract = "High performance narrow-band High-Temperature Superconductor (HTS) filters at 610 MHz with very sharp cut-off response and low loss are needed for improving the observation of pulsars at the Jodrell Bank Observatory, UK. An eight-pole quasi-elliptic HTS filter using compact resonators has been designed for this purpose. The measured response of filter has an insertion loss of 0.3 dB (including a 0.2 dB ripple), and a return loss of 15 dB in the passband. Two transmission zeroes are realized to improve the steepness of the cut-off. The lowest harmonic is designed to appear at 1.79 GHz, about three times the center frequency. The out-of-band rejection is better than 85 dB up to this harmonic. The filter has been tested in the observatory with excellent results.",

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T1 - HTS Narrow Band Filters at UHF Band for Radio Astronomy Applications

AU - Zhou, Jiafeng

AU - Lancaster, Michael

AU - Huang, Frederick

AU - Roddis, N

AU - Glynn, D

PY - 2005/6/1

Y1 - 2005/6/1

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AB - High performance narrow-band High-Temperature Superconductor (HTS) filters at 610 MHz with very sharp cut-off response and low loss are needed for improving the observation of pulsars at the Jodrell Bank Observatory, UK. An eight-pole quasi-elliptic HTS filter using compact resonators has been designed for this purpose. The measured response of filter has an insertion loss of 0.3 dB (including a 0.2 dB ripple), and a return loss of 15 dB in the passband. Two transmission zeroes are realized to improve the steepness of the cut-off. The lowest harmonic is designed to appear at 1.79 GHz, about three times the center frequency. The out-of-band rejection is better than 85 dB up to this harmonic. The filter has been tested in the observatory with excellent results.

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JF - IEEE Transactions on Applied Superconductivity

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HTS Narrow Band Filters at UHF Band for Radio Astronomy Applications

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Keywords

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