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Hokkaido University Collection of Scholarly and Academic Papers >
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ACLR Improvement of a 5-GHz Power Amplifier Using High-Temperature Superconducting Reaction-Type Transmitting Filters
| Title: | ACLR Improvement of a 5-GHz Power Amplifier Using High-Temperature Superconducting Reaction-Type Transmitting Filters |
| Authors: | Futatsumori, Shunichi Browse this author | | Hikage, Takashi Browse this author →KAKEN DB | | Nojima, Toshio Browse this author →KAKEN DB | | Akasegawa, Akihiko Browse this author | | Nakanishi, Teru Browse this author | | Yamanaka, Kazunori Browse this author |
| Issue Date: | Oct-2008 |
| Publisher: | European Microwave Association |
| Citation: | ISBN: 978-2-87487-006-4 |
| Journal Title: | Proceedings of the 38th European Microwave Conference |
| Start Page: | 1145 |
| End Page: | 1148 |
| Publisher DOI: | 10.1109/EUMC.2008.4751661 |
| 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 HTSRTFs 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. |
| Description: | EuMC 2008: 38th European Microwave Conference 2008. 27-31 October 2008. Amsterdam. |
| Conference Name: | European Microwave Conference 2008 (EuMC 2008) |
| Conference Sequence: | 38 |
| Conference Place: | Amsterdam |
| Rights: | © 2008 European Microwave Association, EuMA |
| Type: | proceedings |
| URI: | http://hdl.handle.net/2115/39216 |
| Appears in Collections: | 情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 二ッ森 俊一
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