Ultra-Wideband (UWB) Filter With WLAN Notch

Menzel, Wolfgang; Feil, Peter

doi:10.1109/eumc.2006.281462

Cited by 59 publications

(17 citation statements)

References 5 publications

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“…Especially, it is demanded for recent trends in wireless communication systems which require smart and reconfigurable radio transceivers to meet multiple standards and functions. Furthermore, tunable bandstop filters become more important to reject unwanted signals for wideband applications like ultra-wideband (UWB) systems [5]- [7].…”

Section: Introductionmentioning

confidence: 99%

An Electronically Tuned Bandstop Filter Using BST Varactors

Chun

Bao²,

Jackson³

et al. 2008

2008 38th European Microwave Conference

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Section: Introductionmentioning

confidence: 99%

An Electronically Tuned Bandstop Filter Using BST Varactors

Chun

Bao²,

Jackson³

et al. 2008

2008 38th European Microwave Conference

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“…To this end, two techniques have been reported recently: the integrated notch-band technique and dual-band technique. In [1,2], open circuited stubs are integrated with the UWB BPF to generate desired notching bands; in [3,4], UWB BPFs with notching bands are designed using asymmetric coupled lines with the multiple-mode resonator technique; compact notched-band UWB BPFs are reported in [5,6] by integrating notching resonators on a multilayer structure, and a dual-band UWB BPF is investigated in [7] by using multiple-mode stepped impedance resonators.…”

mentioning

confidence: 99%

Dual-band UWB filter using multilayer liquid crystal polymer technology

Hao

2010

Electron. Lett.

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A novel dual-band ultra-wideband (UWB) bandpass filter with compact size is reported. A multilayer structure is adopted to implement the proposed filter. Broadside-coupled patches are designed on the top and second layers to realise an ultra-wide passband character, and quarter-wavelength resonators are integrated underneath broadside-coupled patches to realise the desired stopband. The proposed filter is fabricated using multilayer liquid crystal polymer lamination technology. Experiment results are presented to verify predicted results, which show the proposed filter has good performance including compact size, sharp stopband rejection and good passband performance.Introduction: Following the exploring of ultra-wideband (UWB) technology in high data-rate wireless communication systems, the UWB bandpass filter (BPF) has attracted much research interest in recent years. However, since the FCC-defined Indoor Limit from 3.1 to 10.6 GHz covers some existing wireless communication systems such as 5.0-6.0 GHz wireless local access network, it is necessary to introduce high rejection in these frequency bands to avoid interference from existing wireless communication systems in the UWB BPF design. To this end, two techniques have been reported recently: the integrated notch-band technique and dual-band technique. In [1,2], open circuited stubs are integrated with the UWB BPF to generate desired notching bands; in [3,4], UWB BPFs with notching bands are designed using asymmetric coupled lines with the multiple-mode resonator technique; compact notched-band UWB BPFs are reported in [5, 6] by integrating notching resonators on a multilayer structure, and a dual-band UWB BPF is investigated in [7] by using multiple-mode stepped impedance resonators.This Letter presents a novel dual-band UWB BPF with compact size using multilayer liquid crystal polymer (LCP) technology. The LCP technology is a promising technology that has much lower fabrication cost than that of low temperature cofire ceramic technology and provides multilayer integration capability to implement compact multilayer threedimensional microwave circuits [2,6]. Moreover, LCP films have excellent electrical and mechanical performance, including small thermal expansion coefficient, low dielectric constant and low dielectric loss in a wide frequency range up to millimetre-wave. In this design, by taking advantage of multilayer LCP technology, broadside-coupled patches are adopted to design the ultra-wideband bandpass filter and quarter-wavelength resonators are integrated underneath broadsidecoupled patches to design the desired stopband. As a demonstration, a dual-band UWB BPF is designed, fabricated and measured. Presented predicted and measured results show the proposed filter has good performance, including compact size and good filter characteristic.

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“…One of the possible and effective solutions for this problem is to realise reconfigurable narrow rejection bands (notches) within the passband of UWB bandpass filters. For this purpose various techniques can be employed; such as applying a slot resonator [7] or a terminated cross-shaped resonator [8] or by using pin diodes [9] and [10]. However, in this paper, the concept, method and modelling of Graphene based switches for reconfiguring/controlling a WLAN notch in an UWB filter is presented.…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable WLAN Notch for UWB filters

Ahmad¹,

Budimir²

2014

2014 9th European Microwave Integrated Circuit Conference

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Ultra-Wideband (UWB) Filter With WLAN Notch

Cited by 59 publications

References 5 publications

An Electronically Tuned Bandstop Filter Using BST Varactors

An Electronically Tuned Bandstop Filter Using BST Varactors

Dual-band UWB filter using multilayer liquid crystal polymer technology

Reconfigurable WLAN Notch for UWB filters

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