Quasi-Elliptic Microstrip Low-Pass Filters Using an Interdigital DGS Slot

@article{Balalem2007QuasiEllipticML,
  title={Quasi-Elliptic Microstrip Low-Pass Filters Using an Interdigital DGS Slot},
  author={Atallah Balalem and A. R. Ali and Jan Machac and Abdounasser Albasher Omar},
  journal={IEEE Microwave and Wireless Components Letters},
  year={2007},
  volume={17},
  pages={586-588}
}
This letter introduces a DGS slot with an interdigital shape. The resonant frequency of the slot can be easily controlled by changing the length of the metal fingers, without changing the area taken by the structure. Using this slot, two quasi-elliptic low-pass filters were designed, fabricated and tested. The filters have a cut-off frequency of about 3 GHz. 

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