Synthesis and design of an LPF with wide-stop band and high rejection level |
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| Affiliation: | 1. LaMOS Research Unit, Faculty of exact sciences, University of Bejaia, 06000, Algeria;2. Mathematic, Informatic and Application Laboratory, University of Haute-Alsace, 12 rue des Freres Lumiere, 68093 Mulhouse Cedex, France;3. Autonomic Networking Environment, ICD/ERA, CNRS UMRSTMR 6279, University of Technology of Troyes, 12 rue Marie Curie, 10010 Troyes Cedex, France;1. Le Quy Don Technical University, Hanoi, Viet Nam;2. Vietnam People’s Army Broadcast Center, Viet Nam;1. ICIST and Escola Superior de Tecnologia do Barreiro, Setubal Polytechnic Institute, Rua Américo da Silva Marinho, 2839-001 Lavradio, Barreiro, Portugal;2. ICIST, Department of Civil Engineering and Architecture, Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal |
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| Abstract: | In this paper, a compact microstrip lowpass filter (LPF) is designed, analyzed, simulated, and tested. The proposed design that consists of a basic part in the central section of the structure and two parts of suppression of harmonics that are inserted in the first and last sections of the basic part, have wide-stop band, high suppression factor (?38 dB attenuation level from 2.4 GHz up to 27.4 GHz), low normalized size and sharp roll-off. The proposed LPF has a ?3 dB cut-off frequency of 2.4 GHz, a wide stopband bandwidth around 11th harmonic suppression and an insertion loss less than 0.1 dB at passband. This filter has been fabricated and tested and good agreement is observed between the simulated and measured results. |
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| Keywords: | Even and odd mode analysis Microstrip low-pass filter (LPF) Sharp transition band Ultra-wide stopband |
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