Electrically small split ring resonator antennas
Author
Alici, K. B.
Özbay, Ekmel
Date
2007Source Title
Journal of Applied Physics
Print ISSN
0021-8979
Electronic ISSN
1089-7550
Publisher
AIP Publishing LLC
Volume
101
Issue
8
Pages
083104 (1-4)
Language
English
Type
ArticleItem Usage Stats
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Abstract
We studied electrically small resonant antennas composed of split ring resonators (SRR) and monopoles. The antennas considered have the same ring radius, but slightly different geometry. The resonance frequency depends on the geometry of the SRRs. Two SRR antennas are designed. The first one, which operates at 3.62 GHz, is demonstrated theoretically and experimentally. The size of this antenna is 0.095 λ0 ×0.100 λ0 and is low profile at the other dimension. The gain and directivity of the antenna was 2.38 and 5.46, respectively. The corresponding efficiency was 43.6%. The estimated radiation Q (rad Q=23.03) was much larger than the minimum radiation Q (min Q=1.78). The second one is a rather small SRR antenna in which the capacitance between the rings is increased. The size is reduced to 0.074 λ0 ×0.079 λ0. This structure is called serrated SRR (SSRR). Both antennas have similar far-field patterns but the efficiency of the SSRR antenna is less.