[ Conception et Simulation de Filtres Passe-Bande Miniaturisés à Base de Résonateur à Saut d’Impédance ]
Volume 34, Issue 2, November 2021, Pages 238–246
Ali Mahamoud Ali1, Bakhit Amine Adoum2, Idriss Saleh Bachar3, and Mahamoud Youssouf Khayal4
1 Laboratoire de Recherche en TIC, Laboratoire de Mathématiques, Modélisation, Informatique, Applications et Simulation, N’djamena, Chad
2 Laboratoire de Recherche en TIC, Laboratoire de Mathématiques, Modélisation, Informatique, Applications et Simulation, N’djamena, Chad
3 Ecole Nationale Supérieure des Technologies de l’Information et de la Communication (ENASTIC), N’djamena, Chad
4 Laboratoire de Recherche en TIC, Laboratoire de Mathématiques, Modélisation, Informatique, Applications et Simulation, N’djamena, Chad
Original language: French
Copyright © 2021 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Microwave filters are generally designed to operate in the frequency range from megahertz (MHz) to gigahertz (GHz). Filters are used in many applications such as broadcasting, television and wireless communications.Thus, these microwave devices need a filter that will decide which signals will be transmitted or received. Today, most designers still have difficulty in designing a filter that provides high performance, matched response, low weight and compact at the same time. In this paper, a dual mode band-pass filter is designed and simulated. The filter design was performed using stepped impedance resonator. The substrate used is Rogers RT5880 with a dielectric constant of 2.2 and a thickness of 787μm. The proposed topology have a total electrical length of 120° and a performance that gives a first spurious resonant frequency at 5.2 times the fundamental resonance frequency. We then incorporated the capacitive element C3 into the topology of the band pass filter in order to achieve the design of the quasi elliptical band pass filter. Transmission zeros and a much narrower transition band are seen at the quasi-elliptical dual mode bandpass filter. The center frequency is at I GHz and there are two transmission zeros in S12.
Author Keywords: Filter, bandpass filter, Bi-mode, stepped impedance resonator (SIR), quasi-elliptical filter, miniaturized filter, spurious frequency.
Volume 34, Issue 2, November 2021, Pages 238–246
Ali Mahamoud Ali1, Bakhit Amine Adoum2, Idriss Saleh Bachar3, and Mahamoud Youssouf Khayal4
1 Laboratoire de Recherche en TIC, Laboratoire de Mathématiques, Modélisation, Informatique, Applications et Simulation, N’djamena, Chad
2 Laboratoire de Recherche en TIC, Laboratoire de Mathématiques, Modélisation, Informatique, Applications et Simulation, N’djamena, Chad
3 Ecole Nationale Supérieure des Technologies de l’Information et de la Communication (ENASTIC), N’djamena, Chad
4 Laboratoire de Recherche en TIC, Laboratoire de Mathématiques, Modélisation, Informatique, Applications et Simulation, N’djamena, Chad
Original language: French
Copyright © 2021 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Microwave filters are generally designed to operate in the frequency range from megahertz (MHz) to gigahertz (GHz). Filters are used in many applications such as broadcasting, television and wireless communications.Thus, these microwave devices need a filter that will decide which signals will be transmitted or received. Today, most designers still have difficulty in designing a filter that provides high performance, matched response, low weight and compact at the same time. In this paper, a dual mode band-pass filter is designed and simulated. The filter design was performed using stepped impedance resonator. The substrate used is Rogers RT5880 with a dielectric constant of 2.2 and a thickness of 787μm. The proposed topology have a total electrical length of 120° and a performance that gives a first spurious resonant frequency at 5.2 times the fundamental resonance frequency. We then incorporated the capacitive element C3 into the topology of the band pass filter in order to achieve the design of the quasi elliptical band pass filter. Transmission zeros and a much narrower transition band are seen at the quasi-elliptical dual mode bandpass filter. The center frequency is at I GHz and there are two transmission zeros in S12.
Author Keywords: Filter, bandpass filter, Bi-mode, stepped impedance resonator (SIR), quasi-elliptical filter, miniaturized filter, spurious frequency.
Abstract: (french)
Les filtres hyperfréquences sont généralement conçus pour fonctionner dans la gamme de fréquences du Mégahertz (MHz) au Gigahertz (GHz). Les filtres sont utilisés dans de nombreuses applications telles que la radiodiffusion, la télévision et les communications sans fil. Ainsi, ces dispositifs hyperfréquences ont besoin d’un filtre qui décidera quels signaux seront transmis ou reçus. De nos jours, la plupart des concepteurs ont toujours du mal à concevoir des filtres qui permettent d’avoir une grande performance, une réponse adaptée, un faible poids une petite taille en même temps. Pour répondre a ces exigences, nous avons conçu et simulé, une nouvelle génération de filtres RF passe bande. La conception du filtre passe bande a été réalisée à l'aide de résonateur à saut d’impédance. Le substrat utilisé est le Rogers RT5880 avec un constant diélectrique de 2,2 et une épaisseur de 787μm. La topologie proposée a une longueur électrique totale de 120° et une performance qui donne une première fréquence de résonance parasite à 5,2 fois la fréquence de résonance fondamentale. La structure proposée est donc beaucoup plus compacte que la structure conventionnelle. Nous avons ensuite incorporé l'élément capacitif C3 dans la topologie du filtre passe-bande afin de réaliser la conception du filtre passe-bande quasi elliptique. La réponse du filtre quasi elliptique est centrée autour de 1GHz et présente deux zéros de transmission.
Author Keywords: Filtre passe bande, Bi-mode, résonateur à saut d'impédance échelonné, filtre quasi-elliptique, filtre miniaturisé, fréquence parasite.
How to Cite this Article
Ali Mahamoud Ali, Bakhit Amine Adoum, Idriss Saleh Bachar, and Mahamoud Youssouf Khayal, “Design and Simulation of Miniaturized Band pass filters Based on Stepped Impedance Resonator,” International Journal of Innovation and Applied Studies, vol. 34, no. 2, pp. 238–246, November 2021.
