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- W2064809779 abstract "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 a 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 YBa2C3O7−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 up to 40 dBm." @default.
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- W2064809779 date "2008-03-06" @default.
- W2064809779 modified "2023-09-27" @default.
- W2064809779 title "A 5 GHz high-temperature superconducting reaction-type transmitting filter based upon split open-ring resonators" @default.
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- W2064809779 doi "https://doi.org/10.1088/0953-2048/21/4/045014" @default.
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