Tunable Bandstop Defected Ground Structure Resonator Using Reconfigurable Dumbbell-Shaped Coplanar Waveguide

Safwat, Amr M. E.; Podevin, Florence; Ferrari, Philippe; Vilcot, Anne

doi:10.1109/tmtt.2006.880654

Cited by 86 publications

(56 citation statements)

References 10 publications

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“…High selectivity and high out-of-band rejection usually can be achieved by increasing the number of DGS resonators. High out-of-band rejection was realized by using several dumbbell-shaped DGSs introduced in [15].…”

Section: Topology Model and Equivalent Circuitmentioning

confidence: 99%

“…DGS is realized by etching off defected pattern on the ground plane of 1-D transmission line, which changes the transmission characteristics of the transmission line. Dumbbell-shaped structure is one of the most popular shapes of DGS which generates ultra rejection band beneficial to higher order harmonic suppression [15]. This paper presents a tunable bandpass filter based on OSRR, which has the dumbbell-shaped DGS.…”

Section: Introductionmentioning

confidence: 99%

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A Varactor-Tuned Bandpass Filter Using Open Split-Ring Resonators

Liu¹,

Wang²,

Xu³

et al. 2014

PIER Letters

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Abstract-This paper presents a compact tunable bandpass filter that is based on open split ring resonator to achieve high out-of-band rejection. Exact equations and design procedures are given based on strict theoretical analysis. By loading the varactor diodes, the center frequency and bandwidth of the bandpass filter could realize reconfigurable. Then defected ground structure was adopted in the input and output ports for the sake of high out-of-band rejection. In order to verify the result of theoretical analysis, a compact tunable bandpass filter with defected ground structure, whose range of frequency was 1.61 GHz ∼ 1.82 GHz and range of relative bandwidth was 8.3% ∼ 24.8%, had been simulated and fabricated. Good agreement between the measured data and the anticipated results is achieved.

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Section: Topology Model and Equivalent Circuitmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Varactor-Tuned Bandpass Filter Using Open Split-Ring Resonators

Liu¹,

Wang²,

Xu³

et al. 2014

PIER Letters

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show abstract

“…If there are floating patches inside the dumbbell-shaped cell, as shown in Fig. 1(c), will exhibit a shift toward lower values [16]. In the H-shaped cell [see Fig.…”

Section: A Compact Sizementioning

confidence: 99%

“…The circuit models for the patterned ground structures were also proposed [2], [15]. Recently, the conventional dumbbell-shaped resonant cell was modified by adding a patch in the middle of the defected holes [16], [17], as shown in Fig. 1(c).…”

Section: Introductionmentioning

confidence: 99%

A Tunable Bandstop Resonator Based on a Compact Slotted Ground Structure

Wang¹,

Wang²,

Zhang

et al. 2007

IEEE Trans. Microwave Theory Techn.

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Abstract-A new slotted ground structure featuring compact size and spurious-free passband in the context of microstrip lines is proposed. The compactness of the new structure originates from the lengthened coupling gap in the ground. The spurious-free response in a wide passband is a result of combining both narrow and wide slots in the new structure, which effectively forms a stepped-impedance slot resonator. Compared to the previously proposed dumbbell-and H-shaped defected ground structure, over 40% size reduction can be realized in the new structure. The new structure also provides flexibilities in introducing additional functionalities to the bandstop resonators. By embedding varactors in the slotted ground structure, tunable bandstop resonators can be implemented and 13% tuning range centered at 2.36 or 2.67 GHz have been obtained. Index Terms-Defected ground structure, microstrip, slotted ground structure, tunable bandstop resonator.

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“…In [6], the conventional dumbbell-shaped DGS was modified by adding a T-shaped patch in the middle of the defected holes which showed tunable bandstop characteristics, as shown in Figure 1. In [7], several tunable dumbbellshaped DGS were proposed to achieve a tuning range extending to 19% using commercially available diode varactors. In [8], a barium-strontium-titanate (BST) varactor chip was deployed to tune the open loop slot DGS resonator which obtained the tunable center frequency from 4.5 to 5.5 GHz.…”

Section: Introductionmentioning

confidence: 99%

A Novel Defected Ground Structure With Both Adjustable Center Frequency and Reconfigurable Bandwidth

Xue¹,

Zhao²,

Yang³

et al. 2014

PIER Letters

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Abstract-A new defected ground structure (DGS) with tunable working frequency and reconfigurable bandwidth is proposed in this paper. The prototype combines the conventional DGS with T-shaped patch featuring narrow bandwidth and two such units located symmetrically featuring wide bandwidth. The proposed structure is designed, simulated and measured. By embedding two reversely-set PIN diodes and four varactors, the proposed structure achieves a narrow bandwidth with a tuning range of 21.1% and a wide bandwidth with a tuning range of 24.6%. In comparison, the bandwidth (−10 dB) is about 13.6% for the narrowband state and 49.2% for the broadband state, where an approximately 4-times extension is obtained.

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Tunable Bandstop Defected Ground Structure Resonator Using Reconfigurable Dumbbell-Shaped Coplanar Waveguide

Cited by 86 publications

References 10 publications

A Varactor-Tuned Bandpass Filter Using Open Split-Ring Resonators

A Varactor-Tuned Bandpass Filter Using Open Split-Ring Resonators

A Tunable Bandstop Resonator Based on a Compact Slotted Ground Structure

A Novel Defected Ground Structure With Both Adjustable Center Frequency and Reconfigurable Bandwidth

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