Design of compact stop-band extended microstrip low-pass filters by employing mutual-coupled square-shaped defected ground structures
✍ Scribed by A. Boutejdar; M. Makkey; A. Elsherbini; A. Omar
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 925 KB
- Volume
- 50
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
Abstract
A new technique to reduce the size, improve the rejection in the stop‐band of a low‐pass filter using modified defected ground structure (DGS) is proposed. An equivalent circuit model is used to study the DGS characteristics. The parameters are extracted by using a simple circuit analysis method. Several comparisons between the EM‐simulations and the circuit simulations of the new structure are demonstrated to show the validity of the proposed equivalent circuit model. We demonstrated that the filter can provide a sharp transition domain and a wide rejection in stop‐band. To further verify the new technique, a filter employing the new deformed DGS is fabricated and measured. The agreement between the simulation and the measured results confirms the effectiveness of the proposed concept. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1107–1111, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23273