Application of a defected ground structure and alternative transmission line for designing a quasi-elliptic lowpass filter and reduction of insertion loss
✍ Scribed by Tamasi Moyra; Kumar Parui; Santanu Das
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 367 KB
- Volume
- 20
- Category
- Article
- ISSN
- 1096-4290
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✦ Synopsis
A new defected ground structure (DGS) consisting of two square ring slots connects with a rectangular ring slot by two thin transverse slots under a microstrip line is proposed. In the frequency characteristics of proposed unit pattern, an attenuation zero is observed close to the attenuation pole. As a result, better transition sharpness, lower passband insertion loss and broader stopband are observed compares to dumbbell DGS. An equivalent lumped L-C network is proposed to model the introduced DGS unit and corresponding L-C parameters are extracted. Insertion loss is reduced by alternative transmission line on the top plane of the DGS unit.