scholarly journals Low Pass Filter Design With Artificial Ground Structure

2017 ◽  
Vol 3 (2) ◽  
Author(s):  
Wahyu Hendra Gunawan ◽  
Fitri Oktafiani ◽  
Bambang Sugeng ◽  
Lukman Lukman
Keyword(s):  
Filter Design ◽  
Pass Band ◽  
Ground Structure ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Band Filter ◽  
Low Pass ◽  
Via Holes ◽  
Computer Based ◽  
Good Agreement

In this paper, low pass band filter with via holes and using artificial ground structure are proposed. The design contains a u-shaped parasite element and gives via hole which is connected to the ground on the adjacent side with a copper. A hole in this design has a diameter 1 mm. The A have the form square 15mm x 17.5mm, given an effect, if compared with the non-artificial ground structure system, this addition show that the bandwidth of the low pass filter is shifting regarding this condition with value 400Mhz at frequency 1GHz.On this paper, the low pass filter also gives the pass band filter on frequency 3.2GHz which is constructed by the artificial ground structure. The simulation results with this design are simulated by computer based on finite integration method and show a good agreement and can be performed for a low pass band filter applications in the future. Keywords: low pass filter, less via, artificial ground structure 

Novel Low-Pass Microwave Filter Based on Rectangular Ring DGS

2013 ◽  
Vol 273 ◽  
pp. 371-374
Author(s):  
Bao Ping Li ◽  
Yan Liang Zhang
Keyword(s):  
Stop Band ◽  
Center Frequency ◽  
Pass Band ◽  
Band Pass Filter ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Compact Size ◽  
Low Pass

Due to the frequency response periodicity of distributed transmission line, microstrip band-pass filter usually produces parasitic pass-band and outputs harmonics away from the center frequency of main pass-band. Based on the study of rectangular ring defected ground structure, a 5-order microstrip LPF(low-pass filter) was designed using the single-pole band-stop and slow-wave characteristics of the rectangular ring DGS(Defected Ground Structure) and SISS(Step-Impedance Shunt Stub) structure. Compared with traditional LPF, this LPF presents the advantages of compact size, low insertion loss, broad stop-band and high steep. It also validates the requirements of miniaturization and high performance for filters.

scholarly journals High-Performance Low-Pass Filter Using Stepped Impedance Resonator and Defected Ground Structure

Electronics ◽  
2019 ◽  
Vol 8 (4) ◽  
pp. 403 ◽  
Author(s):  
Jin Zhang ◽  
Ruosong Yang ◽  
Chen Zhang
Keyword(s):  
High Performance ◽  
Stop Band ◽  
Pass Band ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass ◽  
Stepped Impedance Resonator ◽  
Internal Coupling

A microstrip low-pass filter (LPF) using reformative stepped impedance resonator (SIR) and defected ground structure (DGS) is proposed in this paper. The proposed filter not only possesses the advantage of high frequency selectivity of SIR hairpin LPF with internal coupling, but also possesses the large stop-band (SB) bandwidth by adjusting the number and area of DGS units. The LPF proposed in this paper possesses the properties of miniaturization, wide SB, high selectivity, and low pass-band ripple (PBR) simultaneously. The characteristic parameters of the proposed LPF is that: the pass-band (PB) is 0~2 GHz, the PBR is 0.5 dB, the SB range is from 2.4 GHz to 9 GHz when the attenuation is under 20 dB, and the maximal attenuation could reach 45 dB in the SB. The size of this proposed LPF is 0.13 λ × 0.09 λ ; λ is the corresponding wavelength of the upper PB edge frequency of 2 GHz.

scholarly journals Design of a Novel Ultrawide Stopband Lowpass Filter Using a DMS-DGS Technique for Radar Applications

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Ahmed Boutejdar ◽  
Ahmed A. Ibrahim ◽  
Edmund P. Burte
Keyword(s):  
Pass Band ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Microwave Technology ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass ◽  
Waveguide Length ◽  
Radar Applications ◽  
Microstrip Structure

A novel wide stopband (WSB) low pass filter based on combination of defected ground structure (DGS), defected microstrip structure (DMS), and compensated microstrip capacitors is proposed. Their excellent defected characteristics are verified through simulation and measurements. Additionally to a sharp cutoff, the structure exhibits simple design and fabrication, very low insertion loss in the pass band of 0.3 dB and it achieves a wide rejection bandwidth with overall 20 dB attenuation from 1.5 GHz up to 8.3 GHz. The compact low pass structure occupies an area of (0.40λg  × 0.24λg) where λg = 148 mm is the waveguide length at the cut-off frequency 1.1 GHz. Comparison between measured and simulated results confirms the validity of the proposed method. Such filter topologies are utilized in many areas of communications systems and microwave technology because of their several benefits such as small losses, wide reject band, and high compactness.

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