Frequency switching of electrically small patch antenna using metamaterial loading

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 ri...

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Bibliographic Details
Published in:Indian journal of radio & space physics 2011-06, Vol.40 (3), p.159-165
Main Authors: Joshi, J G, Pattnaik, S S, Devi, S, Lohokare, M R
Format: Article
Language:English
Subjects:
Antennas
Directivity
Indian
Inductance
Metamaterials
Patch antennas
Quality factor
Resonant frequencies
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Summary: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 ( mu ) 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
ISSN:0367-8393