Control of Bandstop Response of Hi–Lo Microstrip Low-Pass Filter Using Slot in Ground Plane

Abdel‐Rahman, Adel B.; Verma, A.K.; Boutejdar, A.; Omar, A.S.

doi:10.1109/tmtt.2004.823587

Cited by 242 publications

(123 citation statements)

References 8 publications

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“…The structure consists of a 50 Ω microstrip line on the top layer and one slot etched from ground plane on the bottom layer of the substrate. The slot is modelled as a parallel LC resonant circuit as shown in Figure 2 [14,22]. The structure has been designed on a high frequency printed circuit board RO4003 with a relative dielectric constant of 3.38 and a thickness of 1.524 mm.…”

Section: Characteristics Of the Slotmentioning

confidence: 99%

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Coupling Reduction of Antenna Array Elements Using Small Interdigital Capacitor Loaded Slots

Abdel‐Rahman¹

2012

PIER C

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Abstract-Small size capacitor loaded ground plane slots are used to reduce the mutual coupling between elements in a microstrip antenna array design. The proposed compact slots are inserted between the adjacent E-plane coupled elements in the array to limit the propagation of surface waves between the elements of the array. In order to validate the feasibility of the proposed structure, a two-element array with 0.5λ o distance between centers of two patches is designed, fabricated, and measured. The measured results show a reduction in mutual coupling of 17 dB obtained between elements at the operation frequency.

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Section: Characteristics Of the Slotmentioning

confidence: 99%

“…Slots have been employed to improve the performance in multiple applications such as filters, couplers, as well as to reduce the mutual coupling between elements of antenna arrays [13][14][15][16][17][18][19][20][21]. In [20], an H-shaped DGS was investigated and applied to reduce mutual coupling, however, the size of DGS slot was large.…”

Section: Introductionmentioning

confidence: 99%

Coupling Reduction of Antenna Array Elements Using Small Interdigital Capacitor Loaded Slots

Abdel‐Rahman¹

2012

PIER C

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“…A compact lowpass filter with sharp roll-off is achieved using a coupled line hairpin unit in [5]. Recently, defected ground structures (DGSs) realized by etching a few defects in the ground plane have been a subject of increasing interest in analyzing the microstrip line characteristics, and the size, shape and orientation of the slot have significant influence on the performance of the lowpass filter [6][7][8][9]. However, the stopband of these filters is not wide enough to remove the undesired harmonics.…”

Section: Introductionmentioning

confidence: 99%

Improved Frequency Response of Microstrip Lowpass Filter Using Defected Ground Structures

Rekha¹,

Abdulla²,

Jasmine³

et al. 2018

PIER C

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Abstract-The frequency response characteristics of a basic microstrip lowpass filter improved using H-shaped defected ground structures are presented. The proposed defected ground structures behave as a resonant element at high frequency and thus eliminate the stopband frequencies to achieve wide stopband rejection. The 3 dB cutoff frequency of the filter is 1.935 GHz. Due to the defects etched in the ground plane of the basic structure, the harmonic rejection is improved from 5th to 10th order along with low insertion loss and voltage standing wave ratio together with good selectivity. The compact filter has a size of 0.0338λ 2 g , with λ g = 85.18 mm being the guided wavelength at the cutoff frequency. The characteristics of the lowpass filter are verified through simulation and measurement. Consistent and stable results are obtained.

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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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Control of Bandstop Response of Hi–Lo Microstrip Low-Pass Filter Using Slot in Ground Plane

Cited by 242 publications

References 8 publications

Coupling Reduction of Antenna Array Elements Using Small Interdigital Capacitor Loaded Slots

Coupling Reduction of Antenna Array Elements Using Small Interdigital Capacitor Loaded Slots

Improved Frequency Response of Microstrip Lowpass Filter Using Defected Ground Structures

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

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