Design of lowpass filters using defected ground structure and compensated microstrip line

Lim, Jongsik; Kim, Chul-Soo; Lee, Young-Taek; Ahn, Dal; Nam, Sangwook

doi:10.1049/el:20020889

Cited by 133 publications

(107 citation statements)

References 10 publications

(15 reference statements)

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“…The bandwidth of this filter is 300MHz. In this proposed design, a stepped impedance method is used with a slot in the conducting strip which gives the series capacitance which is responsible for bandpass characteristics [2]. The reason to choose stepped impedance method is to achieve low pass characteristics and slot gap in strip gives the high pass characteristic so by the combination of both give the bandpass characteristics.…”

Section: Design and Realization Of Bandpass Filter Using Triangular Cmentioning

confidence: 99%

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Investigation on Microstrip Filters with CSRR Defected Ground Structure

Kumar¹,

Patel²,

Kartikeyan³

2016

AEM

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This paper consists the design studies of complementary split ring resonator (CSRR) defected ground structure (DGS) microstrip filter with low insertion loss in the passband and high rejection in stopband with a comparison of various CSRR-DGS structure has been proposed. Various parameters of microstrip filters have been studied with CSRR-DGS such as roll off rate, bandwidth, effective inductance and capacitance. On the basis of these studies, microstrip low-pass, bandpass and dual-band bandstop filters have been designed and realized with enhanced properties of filters.

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Section: Design and Realization Of Bandpass Filter Using Triangular Cmentioning

confidence: 99%

“…The slow-wave effect arises due to the defect in the ground plane of microstrip line. This slow-wave effect assists in size reduction of components [1][2][3]. In recent year, the lefthanded Metamaterial drew the attention of scientist, engineers and researchers in designing microwave components for high performance [4].…”

Section: Introductionmentioning

confidence: 99%

Investigation on Microstrip Filters with CSRR Defected Ground Structure

Kumar¹,

Patel²,

Kartikeyan³

2016

AEM

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“…coupling and reject band. Meanwhile, the application of compensated microstrip line, which forms a lowpass filter (LPF) with the DGSs, enhances the performance of the LPF [9]. Figure 8 illustrates the configuration of the proposed filter II, and Table 2 gives its parameters.…”

Section: Filter Ii: Tunable Dual-band Bpf With Harmonic Suppressionmentioning

confidence: 99%

Dual-Band Bandpass Filter With Independently Tunable Passbands and Wide Stopband

Guo¹,

Feng²,

Lin³

et al. 2014

PIER Letters

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Abstract-This paper presents a dual-mode stub loaded ring resonator (SLRR) to design a tunable dual-band bandpass filter (BPF) with two independently controllable passbands. The proposed resonator principally comprises a stepped-impedance ring resonator (SIRR) loaded with three stubs and two varactor diodes. Two independently tunable passbands are implemented by employing two varactors to control the dominant even-mode resonant frequency and odd-mode resonant frequency, respectively. Moreover, a new stub loaded double-ring resonator (SLDRR) is proposed to design the second tunable dual-band filter by shorting two stubs of the SLRR. With the same tuning method, the second filter can achieve two independently controllable passbands. In order to suppress the harmonics, defected ground structures (DGSs) are introduced at input and output feeding lines without degrading the passbands characteristics. The measured results are in good agreement with the simulated ones.

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“…Recently, slotted-ground-plane resonators in the low-pass filter have attracted much attention [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] because they have numerous advantages like circuitry size reduction and spurious response suppression. By cascading several equilateral resonator units, a lowpass filter with large size can be demonstrated.…”

Section: Introductionmentioning

confidence: 99%

“…The units offer a finitetransmission-zero characteristics and the transmission zeros are used to suppress the spurious response of the low-pass filter. For most of the cases, a stepped-impedance (SI) topology or a gap is required to be utilized in the design of the transmission line above the slotted-groundplane low-pass filter [1][2][3][4][5]11]. In [3], a low-characteristic-impedance transmission line is placed on the top of the slotted ground plane.…”

Section: Introductionmentioning

confidence: 99%

A Multi-Band Meandered Slotted-Groundplane Resonator and Its Application of Low-Pass Filter

Wang¹,

Lin²

2011

PIER

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Abstract-A slotted-ground-plane meandered-slot resonator with multi-resonance characteristics and a compact lowpass filter (LPF) by using the resonator are demonstrated in this paper. The meandered slot provides a wideband resonator with low insertion loss and very sharp cutoff frequency response. Unlike conventional design of cascading bandstop slotted-ground-plane resonators in the literature, the introduced LPF is presented, which consists of a modified-meander slot in the ground plane, a spurred C-like slot, and a uniform microstrip transmission line with constant characteristics impedance. Two rectangular-head slots, giving an increase in the inductance, are added at the two terminals of the meandered slot for purpose of frequency reduction. An arm aperture is embedded to form another resonant path so that an additional transmission zero could be generated. In order to increase rejection capability, the slot width of one section of the meandered-slot resonator is widened. Meanwhile, a C-like slot with a spur slit is also etched inside the meandered slot to improve rejection performance. The measured insertion loss at a passband is below 0.7 dB, and the rejection band over 20 dB is from 2.9 to 12.0 GHz.

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Design of lowpass filters using defected ground structure and compensated microstrip line

Cited by 133 publications

References 10 publications

Investigation on Microstrip Filters with CSRR Defected Ground Structure

Investigation on Microstrip Filters with CSRR Defected Ground Structure

Dual-Band Bandpass Filter With Independently Tunable Passbands and Wide Stopband

A Multi-Band Meandered Slotted-Groundplane Resonator and Its Application of Low-Pass Filter

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