Miniaturization of a patch antenna using circular reactive impedance substrate. Issue 8 (22nd May 2017)

• Record Type: Journal Article
• Authors: Samanta, Gopinath; Mitra, Debasis; Bhadra Chaudhuri, Sekhar Ranjan
• Is Part Of: International journal of RF and microwave computer-aided engineering. Volume 27:Issue 8(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-05-22
• Subjects: bandwidth enhancement -- circular patch antenna -- miniaturization -- reactive impedance substrate -- unit ring; Microwave devices -- Computer-aided design -- Periodicals; Computer-aided engineering -- Periodicals; 621.3813
• DOI: 10.1002/mmce.21126
• Languages: English
• ISSNs: 1096-4290

Abstract

Abstract: In this article, to construct a reactive impedance substrate, unit ring is designed and proposed with radial and concentric mode analysis. A cylindrical substrate backed with a PEC plane and circular metallic elements on the top is used for achieving reactive surface impedance behavior. In this aspect, three unit rings structure with different ring elements are designed and simulated to realize the reflection phase characteristics. Afterwards, a probe‐fed circular patch antenna is miniaturized by stacking the three‐ring circular reactive impedance surface. The fundamental resonance frequency of the proposed antenna is reduced by about 30% with an improvement in impedance bandwidth by 121.6%. An improved front‐to‐back ratio as well as an acceptable co‐pol and cross‐pol isolation is exhibited in both E ‐plane and H ‐plane at the resonance frequency. In addition of miniaturization, dual band behavior has also been observed in the proposed design. Both resonance phenomena have been explained by circuit model representation and surface current distribution analysis. Improved radiation efficiency at 81.5% has been measured for the proposed antenna configuration.