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Effect of variation of dielectric constant of substrate on PBG in microwave region

✍ Scribed by Manoj K. Tiwari; K. K. Gupta; H. C. Gupta; D. C. Dube

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
163 KB
Volume
41
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

The effects of variation of the substrate's dielectric constant and of various geometries on photonic band gap (PBG) are studied on a microstrip‐type periodic metallic structure, and the experimental findings are presented and discussed. In this study, air is chosen as the dielectric material of the substrate. A well‐defined PBG has been observed in all the above cases. The band‐gap changes in the microwave region with the variation of the substrate's dielectric constant and the geometry of the periodic metallic structure are due to characteristic impedance. The transmission loss has been found to decrease with an increase in the dielectric constant of the substrate. Thus, it is concluded that the dielectric constant combined with the characteristic impedance of the periodic structure plays an important role in the formation of PBG. Β© 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 41: 399–403, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20152

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