A NOVEL DEFECTED GROUND STRUCTURE WITH BOTH ADJUSTABLE CENTER FREQUENCY AND RECONFIGURABLE BANDWIDTH

2014 ◽  
Vol 46 ◽  
pp. 89-94
Author(s):  
Xue Cao ◽  
Kai-Yu Zhao ◽  
Li-Li Yang ◽  
Lin Li
Keyword(s):  
Center Frequency ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Adjustable Center

Design of an Ideal Low Pass Microstrip Line Filter Using the Defected Ground Structure

2018 ◽  
Vol 876 ◽  
pp. 133-137
Author(s):  
Ping Cheng Chen ◽  
Chung Long Pan ◽  
J.D. Huang ◽  
S.H. Hong
Keyword(s):  
Frequency Response ◽  
Microstrip Line ◽  
Geometric Shape ◽  
Center Frequency ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Ansoft Hfss ◽  
Low Pass

A design and simulation for low pass microstrip line filter with defected ground structure has been researched, the main purpose is with the simplest method to design an ideal low pass filter. In this paper, simulated soft (Ansoft HFSS V.6.0) used to be simulated the frequency response under different geometric shape of DGS. The results show good performance of a low pass filter with DGS. Final, a low pass filter with DGS design and fabricated, The properties are shown as flow: center-frequency: 7.28G, S21:-47dB, cut-off frequency: 5.88GHz.

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.

Design and Analysis of Inset Fed Wide-Band Rectenna with Defected Ground Structure

2019 ◽  
Vol 29 (03) ◽  
pp. 2050047
Author(s):  
Asmita Rajawat ◽  
P. K. Singhal
Keyword(s):  
Power Transmission ◽  
Wide Band ◽  
Center Frequency ◽  
Impedance Bandwidth ◽  
Wireless Power ◽  
Frequency Range ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Feed Line ◽  
Voltage Doubler

The design proposed and fabricated in this paper is a slotted wide-band rectenna with the inclusion of Defected Ground Structure (DGS) which can harvest RF energy in the frequency range of 5.336–6.194[Formula: see text]GHz with a center frequency of 5.8[Formula: see text]GHz. For the development of antenna, FR4 substrate having a dielectric permittivity of 4.3 has been adopted. Two parallel slots on the patch are incorporated on either side of the feed line to obtain the wide-band structure. Dumbbell-shaped DGS is also incorporated exactly underneath the feed line to increase the gain of the antenna. HSMS-285C Schottky diode has been used for the implementation of the rectifier circuit and a Greinacher voltage doubler has been chosen. ADS design software has been used for rectifier simulation and CST has been used for the designing of the antenna. Current behavior on the patch can be investigated to explore the wide-band mechanism. The antenna operates in the frequency range of 5.336–6.194[Formula: see text]GHz and with VSWR less than 2, which corresponds to 16.07% impedance bandwidth. The antenna achieves a gain of 6.189[Formula: see text]dB and a directivity of 8.776[Formula: see text]dBi. The conversion efficiency of the rectifier was optimized to 75% at 5.8[Formula: see text]GHz. The proposed design gave an output of 3.2[Formula: see text]V which can be used under numerous energy harvesting and wireless power transmission applications.

scholarly journals X-Band Microstrip Bandpass Filter Design using Square Loop Resonator and Defected Ground Structure

2020 ◽  
Vol 7 (1) ◽  
pp. 1
Author(s):  
E. Edwar ◽  
M.R. Yusron ◽  
Dharu Arseno
Keyword(s):  
Bandpass Filter ◽  
Filter Design ◽  
Radar System ◽  
Center Frequency ◽  
Q Factor ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Telecommunication System ◽  
X Band

Filter is an important part in telecommunication system including in radar system. To get the better performance in selecting the signal, a ftlter must have a good Q-Factor. In this paper, an investigation of a ftlter design for synthetic radar has been successfully done. This ftlter has been designed to work at x-band using square loop resonator (SLR). A Defected Ground Structure (DGS) has been implemented to this work to increase the Q-factor of the ftlter. The result of measurement getting that the center frequency at 9.51 GHz with the bandwidth 610 MHz and PCB size of this ftlter is 22 mm x 16 mm.

BANDWIDTH AND GAIN ENHANCEMENT OF MICROSTRIP ANTENNA USING DEFECTED GROUND STRUCTURE AND HORIZONTAL PATCH GAP

SINERGI ◽  
2021 ◽  
Vol 25 (2) ◽  
pp. 153
Author(s):  
Dian Rusdiyanto ◽  
Catur Apriono ◽  
Dian Widi Astuti ◽  
Muslim Muslim
Keyword(s):  
Microstrip Antenna ◽  
Center Frequency ◽  
Reflection Factor ◽  
Defected Ground Structure ◽  
Original Design ◽  
Ground Structure ◽  
Circular Patch ◽  
Gain Enhancement ◽  
Conventional Design ◽  
Small Gain

This research proposed microstrip antenna design using the Defected Ground Structure (DGS) and horizontal patch gap (HPG) for bandwidth and enhancement purposes. This design is to reduce the weakness of a microstrip antenna, which has small gain and narrow bandwidth. The design was simulated in CST Microwave Studio with a working frequency of 2.4 GHz. The design consists of three stages model, i.e., conventional design, DGS modification, and the combination DGS using a Horizontal Patch Gap (DGSHPG). The radius of the conventional circular patch is 16.7 mm. The substrate has 4.6 of dielectric constant, 1.6 of substrate height, and 0.025 of the loss tangent. The simulation results show that the DGS design produces more bandwidth and gain than a conventional design, where the bandwidth and gain improvement are 421.2 MHz and 1.73 dB, respectively. The DGS model is combined with a gap that separates the circular patch (DGSHPG) to achieve the optimum design. The results show the bandwidth and gain improvement of more than 50% and 18.1% compared to the DGS design, respectively. Other parameter performance also shows improvement, such as a reflection factor with -53.3 dB at the center frequency. The physical change also influences the patch’s radius, where it is reduced around 1.4 mm or 8.4% from the original design. Overall, the proposed design has succeeded in achieving bandwidth and gain enhancement and reducing the patch dimension.

Substrate Integrated Waveguide Based Bandpass Filter with Defected Ground Structure for FMCW Radar Application

2020 ◽  
Vol 10 (3) ◽  
pp. 421-429
Author(s):  
Keyur Mahant ◽  
Hiren Mewada
Keyword(s):  
Bandpass Filter ◽  
Frequency Tuning ◽  
Dielectric Material ◽  
Three Dimensional ◽  
Fem Analysis ◽  
Dissipation Factor ◽  
Center Frequency ◽  
Substrate Integrated Waveguide ◽  
Defected Ground Structure ◽  
Ground Structure

Aims : Substrate Integrated Waveguide (SIW) based bandpass filter is presented in this paper. Objectives: In the proposed design, bandpass response is achieved by combining SIW structure with elliptic shaped Defected Ground Structure (DGS) cells. Methods : Simulation of the proposed structure is carried out using commercial software Ansoft High Frequency Structure Simulator (HFSS), which is a three-dimensional frequency domain electromagnetic solver based on the Finite Element Method (FEM). Analysis of three different types of DGS cells including rectangular, circular and elliptical has been carried out. Moreover, Frequency tuning is also carried out by changing the dimension of DGS. Result : Proposed filter is fabricated on the dielectric material RT duroid 5880 with the dielectric constant ɛεr=2.2, dissipation factor tanδ=4 x 10-4 and height h= 0.508 mm. The measured return loss of 25.71 dB and insertion loss of 1.24 dB with 3 dB Fractional Bandwidth (FBW) of 4.8% at the center frequency of 7 GHz. Conclusion : Good agreements are observed between the experimental results and the simulations.

scholarly journals CPW based Band Pass Filter Using DGS for ISM Band Applications

2018 ◽  
Vol 7 (3.34) ◽  
pp. 421
Author(s):  
Mrs. S. Jalaja ◽  
Dr V. Prithivirajan ◽  
K Gajalakshimi ◽  
S Chitra ◽  
R Nithya
Keyword(s):  
Bandpass Filter ◽  
Coplanar Waveguide ◽  
Center Frequency ◽  
Band Pass Filter ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Pass Filter ◽  
Ism Band ◽  
Band Pass ◽  
Filtering Effect

The design and simulation of coplanar waveguide (CPW) bandpass filter (BPF) has been described in this paper. It mainly focuses on Defected Ground Structure (DGS), where U-shaped DGS with open stub in transmission line has been introduced. By etching the DGS pattern in ground and transmission will change the distribution of inductance and capacitance to produce filtering effect. This paper also discusses about the influence of geometrical parameter l for the improvement in the frequency response of bandpass filter. As increasing the dimension of the geometric parameter l shift the center frequency to the higher frequencies. This filter offers a bandwidth of 1.65 GHz with passband ranging from 2.1 GHz to 3.75 GHz with a stopband rejection is about -28 dB.  

Design of a 2.4GHz-Microstrip Line Filter Using the Semicircle Defected Ground Structure

2018 ◽  
Vol 876 ◽  
pp. 105-109
Author(s):  
Ping Cheng Chen ◽  
Chung Long Pan ◽  
T.Y. Lai ◽  
T.U. Lin
Keyword(s):  
Resonant Frequency ◽  
Frequency Response ◽  
Microstrip Line ◽  
Higher Order ◽  
Center Frequency ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Ansoft Hfss

A design and simulation for L-shaped slot microstrip line antenna with semicircle defected ground structure has been researched, the main purpose is suppressing the existence of higher order harmonic. In this paper, simulated soft (Ansoft HFSS V.6.0) used to be simulated the frequency response under different parameters such as dimensions, amounts of SDGS. The results show good performance of SDGS in higher resonant frequency suppression. Final, an antenna with 2.4GHz center frequency had been design and fabricated.

scholarly journals Design of microstrip hairpin bandpass filter for 2.9 GHz – 3.1 GHz s-band radar with defected ground structure

2019 ◽  
Vol 14 (4) ◽  
pp. 448-455 ◽  
Author(s):  
Nanang Ismail ◽  
Teddy Surya Gunawan ◽  
Santi Kartika S ◽  
Teguh Praludi ◽  
Eki A.Z. Hamidi
Keyword(s):  
Insertion Loss ◽  
Return Loss ◽  
Bandpass Filter ◽  
Filter Design ◽  
Center Frequency ◽  
Small Displacement ◽  
Substrate Thickness ◽  
Frequency Range ◽  
Defected Ground Structure ◽  
Ground Structure

Radar has been widely used in many fields, such as telecommunication, military applications, and navigation. The filter is one of the most important parts of a radar system, in which it selects the necessary frequency and blocks others. This paper presents a novel yet simple filter design for S-band radar in the frequency range of 2.9 to 3.1 GHz. The center frequency of the filter was designed at 3 GHz with a bandwidth of 200 MHz, insertion loss larger than -3 dB and return loss less than -20 dB. Fifth order microstrip hairpin bandpass filter (BPF) was designed and implemented on Rogers 4350B substrate which has a dielectric relative constant value of (εr)= 3.48 and substrate thickness of (h) =1.524 mm. One element of the square groove was added as Defected Ground Structure (DGS) which can decrease the filter size, reduce harmonization, and increase return loss. Two scenarios were used in the measurement, i.e. with and without enclosed aluminum casing. Results showed that BPF without casing obtained the insertion loss of -1.748 dB at 2.785 GHz and return loss of -21.257 dB in the frequency range between 2.785 to 2.932 GHz. On the other hand, BPF with casing shows a better performance, in which it obtained the insertion loss of -1.643 dB at 2.921 GHz and return loss of -19.529 in the frequency range between 2.820 to 3.021 GHz. Although there is small displacement of frequency and response value between the simulation and implementation, our BPF has the ability to work on S-band radar with a frequency range of 2 to 4 GHz. 

A Design of Microstrip Line Filter Using the Semicircle Defected Ground Structure

2015 ◽  
Vol 799-800 ◽  
pp. 1217-1221
Author(s):  
Ping Cheng Chen ◽  
Chung Long Pan ◽  
Y.C. Qiu ◽  
G.P. Jhuan
Keyword(s):  
Frequency Response ◽  
Microstrip Line ◽  
Center Frequency ◽  
Q Factor ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Harmonic Frequency ◽  
High Q ◽  
Ansoft Hfss

A design and simulation for microstrip line filter with semicircle defected ground structure has been researched. In this paper, simulated soft (Ansoft HFSS V.6.0) used to be simulated the frequency response under different parameters such as dimensions, amounts of SDGS.The results show good performance of SDGS in high cut-off frequency, erase of harmonic frequency, smaller dimension. Final, a filter with4.4GHz center frequency,high Q-factor had been design and fabricated.

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