LPF/dual-BPF/UWB-BPF reconfiguration utilizing DGS resonators and lumped capacitors

In this work, three successive filter models based on defected ground structure (DGS) techniques are designed, fabricated, and tested to be utilized for different wireless applications. The filters are printed on a RO5880 substrate of an overall size of 22 x 11 x 0.8 mm(3). Three DGSs are etched from the ground plane to achieve the suggested band stop features for all frequencies above 10 GHz. The first model is a low-pass filter that succeeded to pass all frequencies below 10 GHz, the second model is a bandpass filter that operated at 4.5 and 9 GHz after using a pair of interdigital capacitors, and the third model covered all ultra-wideband frequency range when a pair of lumped capacitors is utilized instead of the interdigital capacitors. Good consistency between simulated and measured outcomes is achieved for each of the three filters confirming their suitability to be embedded in small-sized wireless devices.

Automated summary

In this study, three filter models based on defected ground structure (DGS) techniques were designed, fabricated, and tested for various wireless applications. The filters were printed on a RO5880 substrate and achieved suggested band stop features for frequencies above 10 GHz by etching three DGSs. Good consistency between simulated and measured outcomes was observed for each filter, confirming their suitability for embedding in small-sized wireless devices.