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- W2123100022 abstract "Adjacent channel leakage power ratio (ACLR) improvement method of a 5-GHz power amplifier using high-temperature superconducting reaction-type transmitting filters (HTS-RTF) is proposed. The aim of this paper is to clarify the amount of ACLR improvement which is offered by HTS-RTFs. Firstly, measurement results of ACLR improvement using a prototype filter is introduced. The prototype filter has an about 10 dB improvement up to 40 dBm wideband CDMA (W-CDMA) four-carrier signal, even though the suppression band is one side and the bandwidth is narrow. Secondly, to achieve wider suppression band, their resonator structures are optimized. The split-open ring resonator is modified to obtain higher unloaded Q-factor and lower current density. In addition, 5-GHz HTS-RTFs which have 3.5 MHz suppression bands in both sides of the W-CDMA carrier signal are designed. Finally, the ACLR improvement obtained by the newly designed filter is estimated based on numerical analysis. The ACLR is improved by about 10 dB in the both sides. Furthermore, the results show that amplifiers' back-off can be reduced by 5 dB when the HTS-RTFs applied to power amplifiers." @default.
- W2123100022 created "2016-06-24" @default.
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- W2123100022 date "2008-10-01" @default.
- W2123100022 modified "2023-09-27" @default.
- W2123100022 title "ACLR Improvement of a 5-GHz Power Amplifier Using High-Temperature Superconducting Reaction-Type Transmitting Filters" @default.
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- W2123100022 doi "https://doi.org/10.1109/eumc.2008.4751661" @default.
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