2016
DOI: 10.1002/mop.29791
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A CPW bandstop filter using double hairpin-shaped defected ground structures with a high Q factor

Abstract: A new coplanar waveguide bandstop filter using double hairpin-shaped defected ground structures is proposed. The proposed bandstop filter is composed of double hairpin-shaped defected ground structures etched on the ground plane of a coplanar waveguide, and can provide a narrow bandwidth rejection with a high Q factor. Numerical simulations revealed that the bandwidth and resonance frequency of this device can be controlled by adjusting the parameters of the defected ground structure. Moreover, numerical simul… Show more

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Cited by 12 publications
(8 citation statements)
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“…Such resonators can be used to design high Q-factor bandpass and bandstop filters. Microwave high Q-factor bandstop filters have been widely used in communication systems for rejecting unwanted frequency signals to enhance the system performance [5][6][7][8]. For example, in satellite communication systems, particularly in the transceiver of the ground station, the bandstop filters are often needed in the frond-end to pass the downlink signals received by the ground station antenna and to block the uplink signals originated at the transmitting antenna of the same ground station.…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…Such resonators can be used to design high Q-factor bandpass and bandstop filters. Microwave high Q-factor bandstop filters have been widely used in communication systems for rejecting unwanted frequency signals to enhance the system performance [5][6][7][8]. For example, in satellite communication systems, particularly in the transceiver of the ground station, the bandstop filters are often needed in the frond-end to pass the downlink signals received by the ground station antenna and to block the uplink signals originated at the transmitting antenna of the same ground station.…”
Section: Introductionmentioning
confidence: 99%
“…Improvement of the Q-factor of bandstop filters has been achieved in literature using printed transmission lines with a defected ground structure (DGS) [22][23][24][25]. However, the achieved Q-factor is always limited to a few dozens or even lower with some complexity of the structure and needs for lumped elements.…”
Section: Introductionmentioning
confidence: 99%
“…A general bandstop filter is formed by a transmission line loaded with one or multiple resonators. The loaded resonators are shunt-connected with the transmission line through tapped lines [2][3][4][5][6] or coupling lines [7][8][9][10]. For the transmission line, the loaded resonator forms the equivalent short-or open-circuited points at the resonant frequencies.…”
Section: Introductionmentioning
confidence: 99%
“…Changing the shape of the etched patch is another effective method to increase Q-factor. T-shape [2], U-and V-shape [3], E-shape DGS [4], open loop DGS [5], C-shape DGS [6] and double hairpin-shaped [7] are proposed by researchers to enhance Q-factor. Nevertheless, in these papers, Q improvement mechanism still requires further investigation, since all lumped elements of the equivalent models are extracted from EM simulation.…”
Section: Introductionmentioning
confidence: 99%