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 objetivo deste artigo é propor um esquema de projeto eficiente e eficaz para implementar filtros passa-banda de banda larga compactos e de alto desempenho, baseados em uma nova unidade composta de três linhas que consiste em uma estrutura de três linhas acoplada em paralelo, curto-circuitada e carregada em stub e duas linhas principais. Primeiramente, é realizada uma investigação simulada das características de transmissão da unidade de acoplamento proposta. Os resultados mostram que a largura de banda de tal estrutura pode ser prevista por uma unidade simétrica de três linhas em curto-circuito, acoplada em paralelo, enquanto a transmissão é zerada por um ramal de três seções composto pelo ramal carregado, uma das três linhas acopladas em paralelo. e a linha principal. Consequentemente, dadas as especificações, um filtro pseudo-elíptico pode ser projetado em um novo esquema de projeto de duas etapas baseado em três linhas acopladas: 1. após a derivação das novas fórmulas de síntese de forma fechada, uma banda ultralarga Chebyshev (UWB) O filtro é sintetizado em uma banda passante desejada usando unidades de acoplamento simétricas de três linhas. 2. Ao projetar os stubs e escolher os comprimentos adequados das linhas principais, múltiplos zeros de transmissão são então introduzidos para melhorar as características da saia e da banda de parada, enquanto as características de equiripple são mantidas na banda passante. Como exemplo, um filtro passa-banda UWB cobrindo a banda UWB inferior do Japão (BW: 3.1-4.8 GHz, FBW: 43%) foi projetado para descrever o procedimento de projeto proposto. As características de filtragem medidas concordam muito bem com as previsões teóricas, que validam a eficácia da nova estrutura de acoplamento proposta e da correspondente técnica de projeto de filtro. Além disso, os filtros projetados apresentam boas características, como seletividade de saia íngreme, bandas de parada muito largas, tamanho compacto comparado ao filtro baseado em estrutura de três linhas em curto-circuito, etc.
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Chun-Ping CHEN, Junya TAKAHASHI, Zhewang MA, Tetsuo ANADA, Jui-Pang HSU, "Design of Pseudo-Elliptical Wideband Bandpass Filter Using Stub Loaded Short-Circuited Parallel-Coupled Three-Line Units" in IEICE TRANSACTIONS on Electronics,
vol. E93-C, no. 7, pp. 1022-1031, July 2010, doi: 10.1587/transele.E93.C.1022.
Abstract: The purpose of this paper is to propose an efficient and effective design scheme to implement compact, high-performance wideband bandpass filters based on a novel compound three-line unit consisting of a stub-loaded short-circuited parallel-coupled three-line structure and two lead lines. Firstly, a simulative investigation is conducted on the transmission characteristics of the proposed coupling unit. The results show that the bandwidth of such structure can be predicted by a symmetric parallel-coupled short-circuited three-line unit, whereas the transmission zeros by a three-section stub composed of the loaded stub, one of the parallel-coupled three lines and the lead line. Accordingly, given specifications, a pseudo-elliptical filter can be designed in an novel three-coupled-line based two-step design scheme: 1. after the derivation of the new closed-form synthesis formulae, a Chebyshev ultra-wideband (UWB) filter is synthesized on a desired passband using symmetric three-line coupling units. 2. By designing the stubs and choosing the proper lengths of the lead lines, multiple transmission zeros are then introduced to improve the skirt and stopband characteristics, whereas the equiripple characteristics are kept in passband. As an example, a UWB bandpass filter covering the Japan's lower UWB band (BW: 3.1-4.8 GHz, FBW: 43%) is designed to describe the proposed design procedure. The measured filtering characteristics agree very well with the theoretical predictions, which validate the effectiveness of the proposed new coupling structure and corresponding filter design technique. In addition, the designed filters exhibit good characteristics, such as steep skirt selectivity, very wide stopbands, a compact size compared with the filter based on short-circuited three-line structure, etc.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.E93.C.1022/_p
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@ARTICLE{e93-c_7_1022,
author={Chun-Ping CHEN, Junya TAKAHASHI, Zhewang MA, Tetsuo ANADA, Jui-Pang HSU, },
journal={IEICE TRANSACTIONS on Electronics},
title={Design of Pseudo-Elliptical Wideband Bandpass Filter Using Stub Loaded Short-Circuited Parallel-Coupled Three-Line Units},
year={2010},
volume={E93-C},
number={7},
pages={1022-1031},
abstract={The purpose of this paper is to propose an efficient and effective design scheme to implement compact, high-performance wideband bandpass filters based on a novel compound three-line unit consisting of a stub-loaded short-circuited parallel-coupled three-line structure and two lead lines. Firstly, a simulative investigation is conducted on the transmission characteristics of the proposed coupling unit. The results show that the bandwidth of such structure can be predicted by a symmetric parallel-coupled short-circuited three-line unit, whereas the transmission zeros by a three-section stub composed of the loaded stub, one of the parallel-coupled three lines and the lead line. Accordingly, given specifications, a pseudo-elliptical filter can be designed in an novel three-coupled-line based two-step design scheme: 1. after the derivation of the new closed-form synthesis formulae, a Chebyshev ultra-wideband (UWB) filter is synthesized on a desired passband using symmetric three-line coupling units. 2. By designing the stubs and choosing the proper lengths of the lead lines, multiple transmission zeros are then introduced to improve the skirt and stopband characteristics, whereas the equiripple characteristics are kept in passband. As an example, a UWB bandpass filter covering the Japan's lower UWB band (BW: 3.1-4.8 GHz, FBW: 43%) is designed to describe the proposed design procedure. The measured filtering characteristics agree very well with the theoretical predictions, which validate the effectiveness of the proposed new coupling structure and corresponding filter design technique. In addition, the designed filters exhibit good characteristics, such as steep skirt selectivity, very wide stopbands, a compact size compared with the filter based on short-circuited three-line structure, etc.},
keywords={},
doi={10.1587/transele.E93.C.1022},
ISSN={1745-1353},
month={July},}
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TY - JOUR
TI - Design of Pseudo-Elliptical Wideband Bandpass Filter Using Stub Loaded Short-Circuited Parallel-Coupled Three-Line Units
T2 - IEICE TRANSACTIONS on Electronics
SP - 1022
EP - 1031
AU - Chun-Ping CHEN
AU - Junya TAKAHASHI
AU - Zhewang MA
AU - Tetsuo ANADA
AU - Jui-Pang HSU
PY - 2010
DO - 10.1587/transele.E93.C.1022
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E93-C
IS - 7
JA - IEICE TRANSACTIONS on Electronics
Y1 - July 2010
AB - The purpose of this paper is to propose an efficient and effective design scheme to implement compact, high-performance wideband bandpass filters based on a novel compound three-line unit consisting of a stub-loaded short-circuited parallel-coupled three-line structure and two lead lines. Firstly, a simulative investigation is conducted on the transmission characteristics of the proposed coupling unit. The results show that the bandwidth of such structure can be predicted by a symmetric parallel-coupled short-circuited three-line unit, whereas the transmission zeros by a three-section stub composed of the loaded stub, one of the parallel-coupled three lines and the lead line. Accordingly, given specifications, a pseudo-elliptical filter can be designed in an novel three-coupled-line based two-step design scheme: 1. after the derivation of the new closed-form synthesis formulae, a Chebyshev ultra-wideband (UWB) filter is synthesized on a desired passband using symmetric three-line coupling units. 2. By designing the stubs and choosing the proper lengths of the lead lines, multiple transmission zeros are then introduced to improve the skirt and stopband characteristics, whereas the equiripple characteristics are kept in passband. As an example, a UWB bandpass filter covering the Japan's lower UWB band (BW: 3.1-4.8 GHz, FBW: 43%) is designed to describe the proposed design procedure. The measured filtering characteristics agree very well with the theoretical predictions, which validate the effectiveness of the proposed new coupling structure and corresponding filter design technique. In addition, the designed filters exhibit good characteristics, such as steep skirt selectivity, very wide stopbands, a compact size compared with the filter based on short-circuited three-line structure, etc.
ER -