Design of Compact Hilbert Microstrip Bandpass Filter For Modern Wireless Communication Systems
Engineering and Technology Journal,
2010, Volume 28, Issue 12, Pages 2454-2468
AbstractThis paper presents a new microwave narrow-band bandpass filter with a
miniaturized size for use in modern wireless communication systems. The
proposed filter design topology is based on a single-mode microstrip resonator
constructed in the form of Hilbert fractal geometries from 2nd to 4th iteration levels.
The space-filling property the proposed filter topologies possess, has found to
produce reduced size structures corresponding to the successive iteration levels.
Many filters have been designed for the Industrial Scientific Medical band (ISM
band) applications at a design frequency of 2.4 GHz using a substrate with a
dielectric constant of 10.8 and thickness of 1.27mm. The performance of each of
the resulting bandpass filter structures has been analyzed using a method of
moments (MoM) based software package, Microwave Office 2007, from
Advanced Wave Research Inc. Results show that these filters possess good
transmission and return loss characteristics, besides the miniaturized sizes gained;
making them the design specifications of most of wireless communication systems.
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