A 5 GHz high-temperature superconducting reaction-type transmitting filter based upon split open-ring resonators

Futatsumori, S.; Hikage, T.; Nojima, T.; Akasegawa, A.; Nakanishi, T.; Yamanaka, K.

A 5 GHz high-temperature superconducting reaction-type transmitting filter based upon split open-ring resonators

Futatsumori, S.; Hikage, T.; Nojima, T. et al.

Superconductor Science and Technology, 2008, 21(4), 045014

Permalink : https://hdl.handle.net/2115/39005

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アクセス権	open access
URI	https://hdl.handle.net/2115/39005
タイトル	A 5 GHz high-temperature superconducting reaction-type transmitting filter based upon split open-ring resonators
著者	Futatsumori, S. ; Hikage, T. ; Nojima, T. ; Akasegawa, A. ; Nakanishi, T. ; Yamanaka, K.
著者名 Futatsumori, S.
e-Rad_Researcher 30312391 著者名 Hikage, T.
e-Rad_Researcher 40344478 著者名 Nojima, T.
著者名 Akasegawa, A.
著者名 Nakanishi, T.
著者名 Yamanaka, K.
言語	英語
発行日	2008-04
出版者	IOP Publishing
収録物名	Superconductor Science and Technology
巻(号)	21(4)
ページ	045014
抄録	A new kind of high-temperature superconducting (HTS) transmitting filter based on a reaction-type resonator is presented. The purpose of an HTS reaction-type filter (HTS-RTF) is to eliminate the intermodulation distortion noise generated by microwave power amplifiers such as those employed in mobile base stations. An HTS-RTF enables both higher power handling capability and sharper cutoff characteristics compared to existing planar-type HTS transmitting filters, since a reaction-type resonator does not resonate with high-power fundamental signals. To achieve steep skirt characteristics and high-power handling capability simultaneously, a 5-GHz three-pole HTS-RTF using split open-ring resonator is designed. This split open-ring resonator offers low maximum current densities and a high-unloaded Q-factor with low radiation. The designed prototype filter has Chebyshev characteristics with a centre frequency of 4.95 GHz and a bandwidth of 1.5 MHz. The HTS-RTF is fabricated using a double-sided YBa_2C_3O_[7-δ] thin film deposited on a 0.5 mm thick MgO substrate. The measured filter shows an insertion loss of less than 0.1 dB and a third intermodulation distortion value of - 56.7 dBc for a 40 dBm passband signal. In addition, adjacent channel leakage power ratio (ACLR) measurements using an actual Wideband CDMA signal confirm an ACLR improvement of about 10 dB for a four-carrier signal with power of up to 40 dBm.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	This is an author-created, un-copyedited version of an article accepted for publication in Superconductor Science and Technology. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher authenticated version is available online at 10.1088/0953-2048/21/4/045014.
PISSN	0953-2048
EISSN	1361-6668
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1088/0953-2048/21/4/045014