A Review on Miniaturized Microstrip Technology along with Metamaterial for Low Pass filter application

In this paper, the application of microstrip technology is investigated in low-pass filters. A cascade microstrip low-pass filter with a sharp frequency response and a good cut-off bandwidth is presented using a modified radial resonator. The advantages of this proposed filter include minor losses in the transit band as well as the desired return. This filter design shows consistency when compared with the results of simulation and model performance. A comparison between the parameter values of this filter and previous structures indicates that it is desirable. The proposed filter can be used in modern communication systems such as aircraft distance measurement equipment (DME) antenna.

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Conception D'un Filtre Passe-Bas En Technologie Microruban

International Journal of Electrical Engineering Education ◽

10.1177/002072099703400204 ◽

1997 ◽

Vol 34 (2) ◽

pp. 133-140

Author(s):

Mohammed Bekhti

Keyword(s):

Microstrip Technology ◽

Pass Filter ◽

Low Pass Filter ◽

Technologie Microruban ◽

Mathematical Expressions ◽

Low Pass ◽

Fifth Order

The article describes the design of a fifth order low pass filter using microstrip technology. Mathematical expressions are derived for this case (fifth order) and all component values are shown.

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Fractal-Shaped Metamaterials and Applications to Enhanced-Performance Devices Exhibiting High Selectivity

International Journal of Antennas and Propagation ◽

10.1155/2012/515167 ◽

2012 ◽

Vol 2012 ◽

pp. 1-14 ◽

Cited By ~ 3

Author(s):

He-Xiu Xu ◽

Guang-Ming Wang ◽

Chen-Xin Zhang

Keyword(s):

Transmission Lines ◽

High Selectivity ◽

Ground Plane ◽

Cutoff Frequency ◽

Microstrip Technology ◽

Pass Filter ◽

Low Pass Filter ◽

Transmission Zeros ◽

Low Pass ◽

Conductor Strip

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.

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