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2000
Volume 18, Issue 7
  • ISSN: 2352-0965
  • E-ISSN: 2352-0973

Abstract

Background

As one of the key components of ultra-wideband (UWB) system, UWB filter has important research significance. However, the current UWB filter still has the problem of a narrow stopband and cannot suppress the interference signals in the passband.

Objective

In this paper, a novel UWB bandpass filter is proposed, which has wide stopband characteristics and good out-of-band rejection performance and implements a notch function for the WLAN band and the X satellite communication band in the passband to improve the anti-interference performance.

Methods

The filter adopts a novel composite right/left handed transmission line (CRLH-TL) structure to realize the passband characteristics with low insertion loss (< 0.8dB). The anticoupled line structures generate two transmission zeros (TZs) in the upper stopband, which improves the upper stopband performance of the filter. The short circuit step impedance resonators (SIRs) and the asymmetric coupling structure generate a notched band in the passband respectively.

Results

The simulated and measured results show that the 3dB passband range is 3.4-11.0 GHz, the out-of-band rejection is more than 20 dB in the stopband range of 12.8-28 GHz, and the dual-notched bands are located at 5.86 GHz and 8.0 GHz respectively. The measured results are basically consistent with the simulated results.

Conclusion

Compared with the existing filters, the proposed filter has outstanding advantages and has a wide range of application prospects in the field of indoor UWB positioning system.

© 2025 Bentham Science Publishers
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2024-03-25
2025-09-27

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A Wide Stopband Dual-notched Bands UWB Filter Based on A Novel Composite Right/Left Handed Transmission Line
Recent Advances in Electrical & Electronic Engineering 18, 1027 (2025); https://doi.org/10.2174/0123520965295538240313053613
/content/journals/raeeng/10.2174/0123520965295538240313053613
/content/journals/raeeng/10.2174/0123520965295538240313053613
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  • Article Type:     Research Article
Keyword(s): anticoupled line structure; Bandpass filter; composite right/left handed transmission line; dual-notched bands; out-of-band rejection; ultra-wideband

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