NISCAIR Online Periodicals Repository

Research Journals >
Indian Journal of Radio & Space Physics (IJRSP) >
IJRSP Vol.40 [2011] >
IJRSP Vol.40(3) [June 2011] >

Title: Frequency switching of electrically small patch antenna using metamaterial loading
Authors: Joshi, J G
Pattnaik, Shyam S
Devi, S
Lohokare, M R
Keywords: Electrically small antenna (ESA)
Planar metamaterial
Negative permeability metamaterial
Spilt ring resonator (SRR)
Frequency switchable metamaterial loaded small antenna
Issue Date: Jun-2011
Publisher: NISCAIR-CSIR, India
PACS No.: 84.40.Ba
Abstract: A frequency switchable planar metamaterial loaded electrically small microstrip patch antenna, capable of resonating at different frequencies by varying the loading distance, has been presented in this paper. The rectangular microstrip patch antenna is loaded with planar metamaterial square spilt ring resonators (SRRs) in three different configurations at a distance of 0.25, 0.50 and 0.75 mm, respectively to get the switchable resonant frequency performance. The square SRRs reveals negative permeability () presenting the single negative metamaterial (SNG) characteristics. The unloaded rectangular microstrip patch antenna resonates at 23 GHz. In loading condition at different distances, the rectangular microstrip patch antenna resonates at 9.61, 9.51 and 9.41 GHz, respectively. Using Chu limit, size of the antenna, that is ka, reaches 0.766, 0.775 and 0.787 in respective configurations, thus, satisfies the condition ka <1 for electrically small antenna. The resonant frequency of rectangular microstrip patch antenna decreases with respect to the loading distance due to magnetic coupling. As the loading distance gets reduced, the mutual inductance increases resulting in enhancement of the bandwidth of the antenna. In these three loading conditions, the radiation quality factor (Qrad) is larger than the minimum Q that is Qchu. The directivity is more than 7.50 dBi in the presented configurations of electrically small rectangular microstrip patch antenna.
Page(s): 159-165
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-105X (Online); 0367-8393 (Print)
Source:IJRSP Vol.40(3) [June 2011]

Files in This Item:

File Description SizeFormat
IJRSP 40(3) 159-165.pdf438.57 kBAdobe PDFView/Open
 Current Page Visits: 1405 
Recommend this item


Online Submission of Articles |  NISCAIR Website |  National Knowledge Resources Consortium |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2015 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 163640 since 01-Sep-2015  Last updated on 21-Jun-2016Webmaster: