Design And Analysis Of Compact UWB BPF - Global Journals
Global Journal of Researches in Engineering: FElectrical and Electronics EngineeringVolume 17 Issue 4 Version 1.0 Year 2017Type: Double Blind Peer Reviewed International Research JournalPublisher: Global Journals Inc. (USA)Online ISSN: 2249-4596 & Print ISSN: 0975-5861Design and Analysis of Compact UWB BPF Using ParallelCoupled Microstrip Line With DGSBy Satish Chand Gupta, Mithlesh Kumar & Ramswaroop MeenaRajasthan Technical University,Abstract- This paper presents design and analysis of a simple and compact ultra-wideband(UWB) band-pass-filter using parallel-coupled micro strip line with DGS.A two poles filter isdesigned by a parallel couple micro strip line. A rectangular defective ground plane is used toenhance coupling between lines i.e. better return loss in UWB range. Simulation of this proposedfilter is carried out on CST MWS software, and fabricated using microwave laminate GML 1000 ofdielectric constant 3.2 and height 0.762mm with loss tangent 0.001.Measured results arecompared with simulation results with good agreement. The electrical equivalent model of thisfilter is also presented in this paper.Keywords: multi-mode resonator (MMR), fractional bandwidth (FBW), ultra-wide band (UWB), bandpass filter (BPF), parallel-coupled micro strip line(PCML),defective ground plane structure (dgs).GJRE-F Classification: FOR Code: lCoupledMicrostripLineWithDGSStrictly as per the compliance and regulations of: 2017. Satish Chand Gupta, Mithlesh Kumar & Ramswaroop Meena. This is a research/review paper, distributed under theterms of the Creative Commons Attribution-Noncommercial 3.0 Unported License http://creativecom mons.org/ licenses/bync/3.0/), permitting all non commercial use, distribution, and reproduction in any medium, provided the original work is properlycited.
Design and Analysis of Compact UWB BPFUsing Parallel Coupled Microstrip Line WithDGSKeywords: multi-mode resonator (MMR), fractionalbandwidth (FBW), ultra-wide band (UWB), band L),defective ground plane structure (dgs).II.Introductionn 2002, Federal Communication Commission (FCC)released Ultra wide band (UWB) system from 3.1 GHzto 10.6 GHz for the use of indoor and hand-heldsystems. Ultra-wideband (UWB) band pass filters play akey role in the development of UWB systems [1]. Afterthe release of UWB, there were lot of challenges todesign such a band pass filters with a pass band of thefrequency range (3.1 GHz - 10.6 GHz), and a fractionalbandwidth of 110% for conventional filter design. Initiallybroad band filters were designed, and covered only 30to 40 % of UWB not the whole UWB [2].In [3-7] manyresearcher reported various techniques, like aperturecompensation, micro strip-coplanar waveguide structuredesign, ground plane aperture technique and multiplemode resonator were used to design UWB filters. Manynew techniques [8-13], like U-shaped Slot Coupling[8],asymmetric parallel-coupled lines [9],right/lefthanded transmission line [10],differential-mode wideband BPF using two stage branch-line structure withopen circuited stubs [11],tunable harmonic steppedimpedance resonators [12] and parallel coupled linemicro strip structure [13] were used to design the UWBfilter.The synthesis of UWB filter has been carried outby various approaches presented in [14-15].The transfer function of the proposed UWB wassynthesized having two short circuited stubs with [15],series multi conductor transmissionlines (MTLs) and ashunt MTL were used to designvarious UWB filters and a new approach was presentedto synthesis the transfer function of UWB filter.In this paper a design and analysis of acompact UWB filter is presented. In section 2, designand development of the UWB filter using single PCMLand DGS is demonstrated. The electrical analysis of thefilter is mentioned in section 3.Finally paper isconcluded in section.4.II. Design of UWB FilterThe layout of the proposed structure is shown inFig.1 which consist a quarter wavelength parallelcoupled micro strip line (PCML) with a rectangularshaped DGS. The designed structure of filter isoptimized by using CST Microwave Studio software onthe microwave laminate GML 1000 of dielectricconstant 3.2,height h 0.762 mm and loss tangent0.001.The design parameters of the proposed filter arementioned in TABLE 1.Author α σ ρ : University college of Engineering, Rajasthan TechnicalUniversity, Kota, Rajasthan, India. e-mails : satishggc@yahoo.co.in,mith kr@yahoo.com, rssmeena@gmail.com 2017Global Journals Inc. (US)2017Abstract- This paper presents design and analysis of a simpleand compact ultra-wideband (UWB) band-pass-filter usingparallel-coupled micro strip line with DGS.A two poles filter isdesigned by a parallel couple micro strip line. A rectangulardefective ground plane is used to enhance coupling betweenlines i.e. better return loss in UWB range. Simulation of thisproposed filter is carried out on CST MWS software, andfabricated using microwave laminate GML 1000 of dielectricconstant 3.2 and height 0.762mm with loss tangent0.001.Measured results are compared with simulation resultswith good agreement. The electrical equivalent model of thisfilter is also presented in this paper. The equivalent model ofthis filter is verified by comparing the frequency response ofequivalent circuit of the filter and simulated frequencyresponse of this filter.ρYearσ115Global Journal of Researches in Engineering ( F ) Volume XVII Issue IV Version IαSatish Chand Gupta , Mithlesh Kumar & Ramswaroop Meena
Design and Analysis of Compact Uwb Bpf Using Parallel Coupled Microstrip Line With DgsYear2017(a)Global Journal of Researches in Engineering ( F ) Volume XVII Issue IV Version I116(b)Fig.1: Schematic of UWB filter (a) Frontview (b) Back viewTable1: Design Parameters Of The UWB Filterll (mm)wl (mm)sl (mm)lg(mm)wg(mm)6.991.860.116.746.0The optimized structure of this filter is fabricatedusing conventional microwave integrated circuits (MIC)technology, the photograph of the fabricated filter isshown in Fig.2.The frequency response (S11&S21) of thisfabricated filter is measured on Agilent Tech. E5071CENA Vector Network Analyzer. The measured frequencyresponse is compared with simulated frequencyresponse which is in close approximation, and it isshown in Fig.3 (a).It is observed from the frequencyresponse of the fabricated filter, that the pass band ofthis filter exists from 3.1 GHz to 10.9 GHz, insertion loss(S21) of -0.5 dB and return loss (S11) better than 10 dB.The group delay is also measured and compared withsimulation value, and it is observed that this filter havinga flat group delay of value 0.35 ns approximately, whichis shown in Fig.3 (b).A slight mismatch in the results isdue to imperfection in fabrication process, quality ofsubstrate and SMA connectors. The surface currentdistribution at center of the frequency 6.85 GHz isshown in Fig.3(c), which is uniform along the structure ofthe filter, from port 1 to port 2 indicates good pass bandbehavior of the filter.(a)(b)Fig.2: Photograph of fabricated filter (a) Front view (b) Back view 2017Global Journals Inc. (US)
Year2017Design and Analysis of Compact Uwb Bpf Using Parallel Coupled Microstrip Line With DgsGlobal Journal of Researches in Engineering ( F ) Volume XVII Issue IV Version I117(a)(b)Fig.3: (a) Comparison of Frequency responses (b) Group delay(c) 2017Global Journals Inc. (US)
Design and Analysis of Compact Uwb Bpf Using Parallel Coupled Microstrip Line With Dgs(d)Year2017Fig.3: (c ) Surface current density at center frequency 6.85 GHz (top View) (d) Bottom ViewGlobal Journal of Researches in Engineering ( F ) Volume XVII Issue IV Version I118III.Electrical Analysis Of The FilterThe proposed filter consist one parallel coupledmicro strip line with DGS and 50 ohm transmission line.The PCML can be represented by a two mutuallycoupled inductors (L1, L2, K12) and capacitance of theline Ci (between line and ground plane).The 50 ohmstransmission feed line can be represented by a lumpedvalue inductor L0.The electrical equivalent circuit of theproposed UWB filter is shown in Fig.4(a).This circuit isoptimized and simulated on circuit simulator SERENIDESV8.5 for values L0 0.8215 nH,K12 0.6218 ,L1 L2 3.55nH and C2 C3 0.456 pF. The comparison of frequencyresponses of this UWB filter is on CST MWS andequivalent circuit on SERENIDE SV 8.5 shown in Fig.4(b).(a)(b)Fig.4: (a) Electrical equivalent circuit of UWB filter (b) Comparison of frequency responseThe circuit shown in Fig.4 (a) can be analyzed by network circuit theory, and it can be redraw in simplifiedform shown in Fig.5 2017Global Journals Inc. (US)
ABCD-parameters of the circuit shown in Fig.5 can be determined by considering the cascade connection of thenetworks. A B 1 SL0 1 C D 0 1 SC 3 1 SL2 SC2 0 SM1 1 SM2 1 SL2 (SM )2 SC2 1 0 1 SL0 SM SC3 1 0 1 1SL2 SC2 SM-- (1)For the simplification of the matrix multiplication, we have assumed some constant parameters.Where S j j2πf1SC 2 SMSL2 P And2 1 (SM ) SL2 SC2 Q SM A B 1 SL0 1 C D 0 1 SC30 P 11 SM2Q 1 P SC3 0 1 SL0 1 0 1 (2)Let R 1 S L0 C 32 2017Global Journals Inc. (US)119Global Journal of Researches in Engineering ( F ) Volume XVII Issue IV Version IFig.5: Simplified electrical equivalent of UWB filter.Year2017Design and Analysis of Compact Uwb Bpf Using Parallel Coupled Microstrip Line With Dgs
Design and Analysis of Compact Uwb Bpf Using Parallel Coupled Microstrip Line With Dgs A B R C D SC 3SL0 P 11 SML0 PR AB M C D SC3 P 1SM QR SPL0 1 SC3Q P SC3 2017SL0 R . (3)SL0 R . (4)2 SL0SL0 PR QR 2 SPRL0 M L02S L0C3 P SC3 RQ PR M L02AB PR M SC3QR S PL0C3 C D 2 SC P 1 S 2C 2Q33 SMYearQ 1 P SC3 ----- (5)Global Journal of Researches in Engineering ( F ) Volume XVII Issue IV Version I120The insertion and return loss of UWB filter can be calculated by converting the ABCD-parameters into Sparameters. To calculate these, we assume A BYo CZ 0 D()LSL01 2 22 S 2 C 3 Q 2 Z 0 PR 0 SC 3 QR PL0 2 SPL0 R Z 0 2 SC 3 PR QR 2SMMM Z0Similarly, we assume that2-- (6) 1 A BY0 CZ 0 DSL012 2 QR 2 Z 0 2 SC3 P S 2C3 Q MSM Z2 1 2SPL0 R -------- (7)0The S11 & S21 parameters to be calculated by using the final values of ABCD-parameters with help offollowing equations,Where, Y0 S11 A BY0 CZ 0 DA BY0 CZ 0 DS 21 2A BY0 CZ 0 D 1 ------------------- (8)2 ------------------- (9)S11 (dB) 20 log10 S11 ---------------- (10) 1and Z0 50ΩZ0S21 (dB) 20 log10 S21 The expression of S11 and S21 obtained fromequation 8-9 in terms of frequency is solved by usingMATLABandcomparisonamongtheresponses(S11&S21) are shown in Fig.6.The close 2017Global Journals Inc. (US)approximation in the measured response, CSTsimulation response, equivalent circuit response and itsmathematical model response verify the approach ofequivalent circuit of the proposed filter.
2017Design and Analysis of Compact Uwb Bpf Using Parallel Coupled Microstrip Line With DgsYear(a)(b)Fig.6: Comparison of results (a) S21(b) S11IV.ConclusionsA simple and compact two poles UWB bandpass filter using PCML with DGS is implemented. It isobserved that the introduction of DGS in micro strip linecircuit enhance the bandwidth of the system. Theelectrical analysis of this proposed filter is carried out byconventional circuit theory. The size of filter is of size(7.0mm 6.0mm) and such filter may be useful for thesystems of UWB communication.References Références Referencias1. Federal Communications Commission, "Revision ofPart 15 of the Commission's Rules Regarding Ultrawideband Transmission Systems", Tech. Rep., ETDocket 98-153, FCC02-48, April 2002.2. J.T. Kuo and E. Shih, “Wideband band pass filterdesign with three-line micro strip structures" IEEEproc. Microwave Antennas Propag. Vol. 149, No. 5/6,October/December 2002, pp.243-247.3. L. Zhu, H. Bu, and K. Wu, “Aperture compensationtechnique for Innovative design of ultra-broadbandmicro strip band pass filter,” IEEE MTT-S Int. Dig.,Vol. 1, 2000, pp. 315-3184. W. Menzel, L. Zhu, K. Wu, and F. Bogelsack, “Onthe design of novel compact broad-band planarfilters,” IEEE Transaction on Microwave TheoryTechnology, Vol. 51, No. 2, pp. 364-370, Feb. 20035. Li K, Kurita D, Matsui T, “An ultra-wideband bandpass filter using broadside-coupled micro stripcoplanar waveguide structure,” IEEE MTT-S, Int.Dig., June 2005, pp. 675-6786. L. Zhu, H. Bu and K. Wu “Broadband and compactmulti-pole micro strip bandpass filters usingground plane aperture technique,” IEEE proc.Microwave Antennas Propag., Vol. 149, No.1, pp.7177, 20027. [7] L. Zhu, S. Sun and W. Menzel "Ultra-wideband(UWB) band pass filters using Components Letters, Vol. 15, No.11, November2005, pp.796-798.8. G. M. Yang, R. H. Jin, and J. P. Geng, "Planar Microstrip UWB Band pass Filter Using U-shaped SlotCoupling Structure", Electronic Letters, Vol. 42,No.25, December 2006.9. H. Shaman and J. Hong, "Asymmetric ParallelCoupled Lines for Notch Implementation in UWB 2017Global Journals Inc. (US)Global Journal of Researches in Engineering ( F ) Volume XVII Issue IV Version I121
Design and Analysis of Compact Uwb Bpf Using Parallel Coupled Microstrip Line With Dgs10.11.Year201712.13.Global Journal of Researches in Engineering ( F ) Volume XVII Issue IV Version I12214.15. 2017Filters", IEEE Microwave and Wireless ComponentsLetters, Vol. 17, No.7, July 2007, pp.516-518.Li Bin; Li Xu-ping “Ultra wideband filter designbased on right/left-handed transmission line”Antennas, Propagation and EM Theory, 2008. ISAPE2008Eck Beng Lim and Lei Zhu“A Differential-ModeWideband Band pass Filter on Micro strip Line forUWB Application” IEEE Microwave and WirelessComponents Letters, Vol. No.19, Oct. 2009M. Mokhtaari, J. Bornemann and S. Amari, “AModified Design Approach for Compact UltraWideband Micro strip Filters,” International Journal ofRF & Microwave CAE, Vol. 20, No. 1, 2010, pp. 6675.Thirumalaivas an K and Nakkeeran R. “ParallelCoupled Micro strip Band pass Filter for nceandInformationTechnologyCommunications in Computer and InformationScience, Vol. No. 250. 2011Chun-Ping Chen, Hiroshige Nihei, Zhewang Ma andTetsuo Anada “Synthesis of compact UWB bandpass filter with improved performances” Microwaveand Optical Technology Letters, March 2010.Juan José Sánchez-Martínez, Enrique MárquezSegura, and Stepan Lucyszyn, “Synthesis andDesign of High-Selectivity Wide band Quasi-EllipticBand pass Filters Using Multi conductorTransmission Lines” IEEE Transactions onMicrowave Theory and Techniques, Vol. 63, No. 1,Jan. 2015Global Journals Inc. (US)
Design and Analysis of Compact UWB BPF Using Parallel Coupled Microstrip Line With DGS By Satish Chand Gupta, Mithlesh Kumar & Ramswaroop Meena Rajasthan Technical University, Abstract- This paper presents design and analysis of a simple and compact ultra-wideband (UWB) band-pass-filter using parallel-coupled micro strip line with DGS.A two .
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