Planar Microstrip UWB Bandpass Filter with Quad Notched Bands and High Selectivity

Title:Planar Microstrip UWB Bandpass Filter with Quad Notched Bands and High Selectivity

Volume: 14 Issue: 4

Author(s): Mingming Gao, Keda Xu*, Jingchang Nan and Li Wang

Affiliation:

• School of Electrics and Information Engineering, Liaoning Technical University, Huludao, China

Keywords: Filter, ultra-wideband, multiple-mode resonator, defected ground structure, notched band, resonance frequency.

Abstract: Background: This study aims at solving the problems of large design size and insufficient number of the notched band for traditional ultra-wideband (UWB) filters. A planar compact microstrip UWB bandpass filter (BPF) with quad notched bands and good selectivity is proposed using a modified multiple-mode resonator (MMR) and defected ground structure (DGS).

Methods: The MMR consists of a stepped impedance stub above and two pairs of open-circuited stubs on both sides, which can generate the passband and double notched bands of UWB filter, the other two notched bands are obtained by DGS.

Results: The UWB filter with quad notched bands respectively centered at 3.9 GHz, 5.7 GHz, 7.9 GHz, and 9.8 GHz is fabricated and measured.

Conclusion: The measured results are basically consistent with the simulated results, which proves the correctness and practicability of the UWB filter.

Cite this article as:

Gao Mingming , Xu Keda *, Nan Jingchang and Wang Li , Planar Microstrip UWB Bandpass Filter with Quad Notched Bands and High Selectivity, Recent Advances in Electrical & Electronic Engineering 2021; 14 (4) . https://dx.doi.org/10.2174/2352096514666210118141959

DOI https://dx.doi.org/10.2174/2352096514666210118141959	Print ISSN 2352-0965
Publisher Name Bentham Science Publisher	Online ISSN 2352-0973