Compact Band-Stop X-Band Filter Using Triple Meander-Line-Ring Defected Ground Structures
Keywords:
Band-stop filter, meander-line structure, radar system, X-band applicationAbstract
This paper work deals with design and development of compact microstrip band-stop filter (BSF) for radar applications. The microstrip filter configuration consists of a transmission line and a modified ground plane with three meander-line ring defected ground structures (DGS). The proposed microstrip filter fabricated on a Rogers RT/Duroid 5880 substrate with a relative dielectric constant of 2.2 and has a very small size of 10×15×0.635 mm3 . The proposed BSF has a flat impedance bandwidth of 8-12 GHz with an insertion loss which is larger than 35 dB and a return loss which is less than 0.5 dB at the center of the band-stop frequency range. The operating frequencies of the filter can be easily controlled by changing the dimensions of the meander-line rings without changing the area taken up by the structures. The introduced filter has an excellent out-of-band performance. A good agreement between measured and simulated results was obtained. The proposed filters are promising for use in wireless technologies for radar communications due to their simple structure, compact size, and excellent performance.
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References
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