A miniature 5.2-GHz bandstop microstrip filter using multilayer-technique and coupled octagonal defected ground structure

✍ Scribed by Ahmed Boutejdar; Abbas Omar

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 259 KB
• Volume: 51
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.24770

✦ Synopsis

Abstract

In this article, we propose a new compact defected ground structure (DGS) bandstop filter with broad pass‐band, low insertion loss in the stop‐band, and sharp transition from pass‐ to stop‐band. The bandstop filter structure is simple as it is composed of a pair of octagonal DGS slots and open stubs as a compensated microstrip capacitance. The filter is realized as a multiplayer structure with wide lossless stop‐band. The behavior of the filter has been investigated using EM as well as lumped‐element equivalent circuit model simulations. The design equations are derived using an equivalent circuit model of a parallel L–C resonator. The proposed filter has been optimized, fabricated, and measured. The agreement between the simulated and measured results confirms the effectiveness of the proposed concept. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2810–2813, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24770