Fractal-Shaped Metamaterials and Applications to Enhanced-Performance Devices Exhibiting High Selectivity
Novel single negative metamaterial (MTM) transmission lines (TLs) are presented and studied in microstrip technology. They consist of a host TL in the conductor strip and a fractal-shaped complementary rin...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2012-01-01
|
| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2012/515167 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Novel single
negative metamaterial (MTM) transmission lines
(TLs) are presented and studied in microstrip
technology. They consist of a host TL in the
conductor strip and a fractal-shaped
complementary ring resonator (CRR) etched in the
ground plane. Two types of fractal-shaped CRR
are involved including the Moore and Hilbert. It
is found that fractal perturbation in CRR
results in lower and more transmission zeros in
comparison with conventional CRR using
nonfractal geometries. The single
negative-permeability or -permittivity of these
MTM TLs which associated with the resultant
multitransmission zeros occurs by turns and
should benefit devices with high selectivity
requirement. Potential application of these MTM
cells are illustrated by two examples, one is
the microstrip stepped-impedance transformers
(SIT) operating at 3.5 GHz with two edged
attenuation poles to introduce selectivity; the
other one is the Hi-Lo microstrip low-pass
filter (LPF) with cutoff frequency
2.5 GHz exhibiting improved selectivity
(77.3 dB/GHz). By constructing the low-impedance sections as hybrid prefractal shape
and crown square, both the SITs and LPF obtained
additional bandwidth enhancement and good
matching. Consistent results between simulation
and measurement have confirmed the design
concept. |
|---|---|
| ISSN: | 1687-5869 1687-5877 |