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- Title
Symmetrical Impedance Microstrip Coupled Line Coupler Using Fractal DGS for Lower C-band Applications.
- Authors
Bhakhar, Praful S.; Dwivedi, Vedvyas J.
- Abstract
This research paper investigates about the novel approach in the design, fabrication and testing of a microstrip coupled line coupler using Sierpinski Gasket fractal Defected Ground Structure (DGS), which finds applications for microwave lower C-band communication systems. The planar coupled line coupler with an embedded fractal DGS (FDGS) structure is designed for an operating frequency of 5 GHz. The dielectric substrate used here has a dielectric constant of 4.4. The design allows planar conventional coupler with an embedded FDGS operating at 5 GHz, which was designed independently and then integrated that resonating FDGS with conventional planer coupler. The analysis is carried out by varying the Sierpinski Gasket FDGS pattern. Comparisons between simulated and measured results confirm the validity of the proposed FDGS. This design results in significant reduction in size of the coupler. Incorporating 3rd iterated FDGS reduces the length of the coupler up to 25.93% compare to the conventional coupler. Also, more than 50% improvement in reflection coefficient and more than 25% improvement in isolation factor are noted.
- Subjects
MICROSTRIP transmission lines; ELECTRONIC band structure; ELECTRIC impedance; SYMMETRY (Physics); FABRICATION (Manufacturing)
- Publication
International Journal of Microwave & Optical Technology, 2018, Vol 13, Issue 2(II), p159
- ISSN
1553-0396
- Publication type
Article