The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
O projeto de filtros passa-banda microstrip usando ressonadores de impedância escalonada (SIRs) é examinado. A frequência central da banda passante para o sistema celular japonês WCDMA-FDD (banda de uplink) é 1950 MHz com largura de banda de 60 MHz. A característica física SIR pode ser projetada usando um gráfico de características SIR baseado na supressão de segundo harmônico. Em nosso projeto de filtro, os gráficos de projeto de banda passante foram obtidos através do procedimento de projeto. Filtros passa-banda Tchebycheff e maximamente planos de qualquer largura de banda e qualquer número de etapas podem ser projetados usando esses gráficos de projeto de banda passante. Além disso, as características de saia acentuada na banda passante podem ser realizadas com dois zeros de transmissão em ambas as bandas de frequência adjacentes, usando stubs abertos de um quarto de comprimento de onda nas portas de entrada e saída. Uma nova técnica de supressão de harmônicos em modo par é proposta para permitir uma ampla banda de rejeição com um alto nível de supressão. O fator de qualidade descarregado do ressonador utilizado nos filtros propostos é superior a 240.
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Somboon THEERAWISITPONG, Toshitatsu SUZUKI, Noboru MORITA, Yozo UTSUMI, "Design of Microstrip Bandpass Filters Using SIRs with Even-Mode Harmonics Suppression for Cellular Systems" in IEICE TRANSACTIONS on Electronics,
vol. E93-C, no. 6, pp. 867-876, June 2010, doi: 10.1587/transele.E93.C.867.
Abstract: The design of microstrip bandpass filters using stepped-impedance resonators (SIRs) is examined. The passband center frequency for the WCDMA-FDD (uplink band) Japanese cellular system is 1950 MHz with a 60-MHz bandwidth. The SIR physical characteristic can be designed using a SIR characteristic chart based on second harmonic suppression. In our filter design, passband design charts were obtained through the design procedure. Tchebycheff and maximally flat bandpass filters of any bandwidth and any number of steps can be designed using these passband design charts. In addition, sharp skirt characteristics in the passband can be realized by having two transmission zeros at both adjacent frequency bands by using open-ended quarter-wavelength stubs at input and output ports. A new even-mode harmonics suppression technique is proposed to enable a wide rejection band having a high suppression level. The unloaded quality factor of the resonator used in the proposed filters is greater than 240.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.E93.C.867/_p
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@ARTICLE{e93-c_6_867,
author={Somboon THEERAWISITPONG, Toshitatsu SUZUKI, Noboru MORITA, Yozo UTSUMI, },
journal={IEICE TRANSACTIONS on Electronics},
title={Design of Microstrip Bandpass Filters Using SIRs with Even-Mode Harmonics Suppression for Cellular Systems},
year={2010},
volume={E93-C},
number={6},
pages={867-876},
abstract={The design of microstrip bandpass filters using stepped-impedance resonators (SIRs) is examined. The passband center frequency for the WCDMA-FDD (uplink band) Japanese cellular system is 1950 MHz with a 60-MHz bandwidth. The SIR physical characteristic can be designed using a SIR characteristic chart based on second harmonic suppression. In our filter design, passband design charts were obtained through the design procedure. Tchebycheff and maximally flat bandpass filters of any bandwidth and any number of steps can be designed using these passband design charts. In addition, sharp skirt characteristics in the passband can be realized by having two transmission zeros at both adjacent frequency bands by using open-ended quarter-wavelength stubs at input and output ports. A new even-mode harmonics suppression technique is proposed to enable a wide rejection band having a high suppression level. The unloaded quality factor of the resonator used in the proposed filters is greater than 240.},
keywords={},
doi={10.1587/transele.E93.C.867},
ISSN={1745-1353},
month={June},}
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TY - JOUR
TI - Design of Microstrip Bandpass Filters Using SIRs with Even-Mode Harmonics Suppression for Cellular Systems
T2 - IEICE TRANSACTIONS on Electronics
SP - 867
EP - 876
AU - Somboon THEERAWISITPONG
AU - Toshitatsu SUZUKI
AU - Noboru MORITA
AU - Yozo UTSUMI
PY - 2010
DO - 10.1587/transele.E93.C.867
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E93-C
IS - 6
JA - IEICE TRANSACTIONS on Electronics
Y1 - June 2010
AB - The design of microstrip bandpass filters using stepped-impedance resonators (SIRs) is examined. The passband center frequency for the WCDMA-FDD (uplink band) Japanese cellular system is 1950 MHz with a 60-MHz bandwidth. The SIR physical characteristic can be designed using a SIR characteristic chart based on second harmonic suppression. In our filter design, passband design charts were obtained through the design procedure. Tchebycheff and maximally flat bandpass filters of any bandwidth and any number of steps can be designed using these passband design charts. In addition, sharp skirt characteristics in the passband can be realized by having two transmission zeros at both adjacent frequency bands by using open-ended quarter-wavelength stubs at input and output ports. A new even-mode harmonics suppression technique is proposed to enable a wide rejection band having a high suppression level. The unloaded quality factor of the resonator used in the proposed filters is greater than 240.
ER -