Design and Performance Analysis of Corporate Feed Antenna Array for WLAN Application at 2.4 GHz

Transcription

1 Intenational Jounal of Electical and Electonics Reseac ISSN (online) Vol. 4, Issue 3, pp: ( ), Mont: July - Septembe 016, Available at: Design and Pefomance Analysis of Copoate Feed Antenna Aay fo LAN Application at.4 GHz 1 Pajakta Uday Cavan, D. Mousami V. Munot 1 Depatment of Electonics and Telecommunication, Pune Institute of compute tecnology, Pune, India Depatment of Electonics and Telecommunication, Pune Institute of compute tecnology, Pune, India Abstact: Fomation of beam used to access all amplitude and pase of equied signals. Cuent pape descibes design and simulation fo educed size of Micostip patc antenna wit paallel powe divide opeating at.4 GHz. Evey ieless LAN Application always demands fo inceased bandwidt and bette quality of sevice. Because of muc moe advantages suc as less cost, easy fabication, vesatile and flexible, Micostip patc antennas ae widely used. Te pactical opeation of tis micostip patc antenna as been simulated on 4 1 micostip patc antenna wit consists of Powe Divide. Results fom simulation ae obseved by Ansoft HFSS vesion13 softwae in tems of Retun loss, VSR, adiation and Beam pattens. Micostip patc antenna wit Powe Divide as been fabicated on FR4/Roges PCB. Simulated and measued esults sow good pefomance and analysis. Te poposed Micostip patc antenna will be connected by 50 Ω Micostip feed line. Pased antenna aay may be to use a switced adiation patten o to scan Beam of antenna apidly in angle of azimut o elevation. Patc antenna aays ae used in mobile communications. Keywods: Micostip patc antenna, Pased antenna aay, Mobile communication, 50 Ω feed line. I. BASIC INTRODUCTION OF MPA ARRAY ITH POER DIVIDER Fomation of Beam o filteing of spatial is a signal steeing metod used in many wieless communication applications to signal tansmit and eceive accuately. Tis situations/esults ae acieved by combining all elements of patc antenna aay [1]. So tis topic of fomation of Beam netwok using pased antenna aay as been moe popula and attention because of its wide ange of applications and moe advantages of Micostip patc antenna. Fomation of Beam systems can be boadly divided into two categoies: Adaptive (pased) Beam-fome and Switced (conventional) Beam-fome [1][3]. Pased antenna aay eceiving a lot of attention fo LAN applications [1] as tey ae cost effective design fo developing smat antenna system in many applications. Pased antenna aay is a set o bunc of antennas in wic te elative all pases of espective signal applying te antennas. Te aay is designed by fou single patced antennas wic povide Omni-diectional adiation pattens individually. Fo Micostip antennas, te ange of dielectic constants is basically in tems of. 1. Dielectic constants te low end of ange can give us exta advanced efficiency, bette bandwidt. Simulated antennas can be easily fabicated on FR4 ( =4.4), RT/Duoid 5880 ( =.) o ig dielectic constant of ( =10. R03010) mateial of substate. Popula Micostip antenna feeding system is te copoate feeding. Copoate/paallel feed tecnique is used fo good matcing impedance at input of adiation elements of Micostip patc antennas. Reseac Publis Jounals Page 140

2 Intenational Jounal of Electical and Electonics Reseac ISSN (online) Vol. 4, Issue 3, pp: ( ), Mont: July - Septembe 016, Available at: II. FORMATION OF BEAM NETORK USING CORPORATE FEED ANTENNA ARRAY SPECIFICATION AND DESIGNS Antenna aay is in te fom of netwok wit input and output, ote supplementay netwoks wee p is no. of tuns suc as ybid junctions, pase siftes [1]. In tis study fou aay antennas ave been designed wit same adiation patten because fou Beams ae needed. Fig.1 sows te geneal Block diagam of Feed Netwok wit pased antenna aay. By combining all elements of pased antenna aay, aay is designed successfully and fabicated on FR4/Roges substate wit elative pemittivity. Simulated esults ae obtained fom Ansoft HFSS softwae to analysis te esults. Te design fequency of equied antenna is.4 GHz. Requied Micostip patc antenna is connected by 50Ω Micostip feed line. Micostip patc antenna wit Powe Divide is used to divide powe levels of (i.e. m =, 4, 8, 16.etc). Tis is acieved by quate wavelengt impedance tansfome o tapeed line type of Powe Divide [8]. Fig. 1 Geneal Block diagam of Feed Netwok III. DESIGN PROCEDURE OF MICROSTRIP PATCH ANTENNA Micostip ectangula patc antenna, widt as well as lengt can be measued as follow [3], C f 1 (1) ee, C = ligt velocity and = dielectic constant mateial, = Resonant design Fequency [3], f 1 1 eff 1 1 = 1.67mm eigt of substate, Extended lengt of patc is [3], 1 ( eff 0.3)( 0.64) (3) L 0.41[ ] ( eff 0.58)( 0.8) By using above fomulas, we can find exact lengt of Micostip patc antenna [3], () C L L f eff Fomulas fo gound calculation as follow [3], (4) Reseac Publis Jounals Page 141

3 Intenational Jounal of Electical and Electonics Reseac ISSN (online) Vol. 4, Issue 3, pp: ( ), Mont: July - Septembe 016, Available at: L g g 6 L 6 (5) (6) e can also calculate aay facto fo antenna aay[3], ( FA) sin ( N ( d By using above matematical computation equation, te patc paametes ave been designed fo te FR4 substate. Te esults ae summaized in TABLE I. IV. (7) ANTENNA ARRAY SPECIFICATION Micostip patc antenna stuctues ae descibing in figue and figue 3. Simulated antenna will be done by applying FR4 epoxy mateial on substate aving dielectic constant mateial 4.4 and te equied fequency.4ghz is consideed. Antenna is connected toug 50Ω micostip feed line. Simulated wok is done by using Ansoft HFSS softwae. All te specifications ae given in te table1 (all Llengts and widts in mm and fequency in GHz). A. Patc antenna x / )sin))/ N sin ( ( d x / )sin) TABLE I: DESIGN DIMENSIONS SR No. PARAMETERS VALUES I Resonant fequency( f ).4 GHz II dielectic constant( ) 4.4 III Substate eigt( ) 1.67mm IV Patc Lengt( L ) 38.03mm V Patc idt( ) 9mm VI Effective dielectic constant( eff ) 4.6 VII Extended lengt( L ) 39.77mm VIII Inset fed 1mm IX Feed lengt 3mm V. SIMULATED RESULTS AND DICSUSION Low Micostip patc antenna bandwidt is most impotant paamete tat limits its wide ange coveage. In te cuent wok te Micostip ectangula antenna bandwidt is inceased by applying insect feed wit patc antenna. Simulated pefomance of equied Micostip ectangula patc antenna is acieved by using Ansoft HFSS softwae at selected design of.4 GHz fequency. Simulated esults like Retun loss, VSR, Total gain, pattens etc. fo equied antenna ae sown in te figues. Fig. Top and side view of Micostip patc antenna Reseac Publis Jounals Page 14

4 Intenational Jounal of Electical and Electonics Reseac ISSN (online) Vol. 4, Issue 3, pp: ( ), Mont: July - Septembe 016, Available at: Fig. 3(a) Retun loss Vs Fequency plot Fig. 3(b) Measued Retun loss Vs Fequency plot Fig. 4 VSR Vs Fequency gap Reseac Publis Jounals Page 143

5 Intenational Jounal of Electical and Electonics Reseac ISSN (online) Vol. 4, Issue 3, pp: ( ), Mont: July - Septembe 016, Available at: Fig. 5 Diectivity of equied antenna plot Fig. 6 Gain of equied antenna Simulated and measued Retun Loss of te antenna is db and db espectively as sown in Fig. 4,5. Gain and diectivity of te antenna ae 8.8 dbi and 0.0 dbi espectively. Antenna etun loss is -10dB o lowe fom.437 GHz to.46 GHz, so tis can be used in.4 GHz band LAN system. B. Copoate Feed Netwok Fig. 7 Scematic diagam of Powe Divide Reseac Publis Jounals Page 144

6 Intenational Jounal of Electical and Electonics Reseac ISSN (online) Vol. 4, Issue 3, pp: ( ), Mont: July - Septembe 016, Available at: Copoate feed aays ae geneal and vesatile. Tis metod as moe contol of te feed of eac element and is ideal fo scanning pased aays, multi Beam aays. Fig. 8 Copoate Feed antenna aay Fig. 9 Retun Loss Vs Fequency plot Fig. 9 sows Retun Loss of Fou-Patces Rectangula Micostip Antenna Aay (Copoate feed) is at GHz f =.4 Fig. 10 Beam fomation of Copoate Feed antenna aay Reseac Publis Jounals Page 145

7 Intenational Jounal of Electical and Electonics Reseac ISSN (online) Vol. 4, Issue 3, pp: ( ), Mont: July - Septembe 016, Available at: Gain of te antenna is db. Side lobe label is db and db lowe tan main lobe is sown in Fig. 10. Antenna Retun Loss is -10 db o lowe fom.437 GHz to.46 GHz, so tis can be used in.4 GHz band LAN system. e implement tis antenna fo pefomance evaluation. Measued adiation patten and VSR of an antenna ae not satisfactoy; side lobe label is -7.5 db lowe tan main lobe and VSR is moe tan unity. Tis is because of fabication and measuing equipment limitation. VI. CONCLUSION Fomation of Beam netwok is used to stee antenna beams accuately. Tese types of antennas ae linea so tese types of antenna contol te antenna pattens in single plane. Tis antenna aay is fabicated to study about pattens of vaious adiations ove fequency ange of LAN applications.4 GHz. Retun loss, VSR and total gain of antenna ae obtained using te basic elements of antenna aay. Radiation caacteistics ae veified between simulated and measued esults. Micostip patc antenna bandwidt is gained by 5%. REFERENCES [1] ide band fou pot Butle matix fo switced mult-ibeam antenna aay, IEEE 003 Intenational symposium on pesonal,indoo and Mobile Radio Communication Poceeding, pp , 003 [] E. Siacalou, E. Vafiadis, S. Goudos, T. Samaas, C.S. Koukoulis, and Stavos Panas, Design of switced Beam ideband Base stations, IEEE Antenna and Popagation Magazine, Vol. 46, No. 1, pp , Febuay 004 [3] Constantine A. Balanis, Antenna teoy, Analysis and Design, Jon iley & Sons, Inc Hoboken, New Jesey, 005 [4] Jesse Butle, Ralp Lowe, Beam-Foming Matix Simplifies Design of Electonically Scanned Antennas, Electonic Design, volume 9, pp , Apil 1, 1961 [5] Amed Fatti Alsage, Design and Analysis of Micostip Patc Antenna Aays Maste of Science wit a Majo in Electical Engineeing Communication and Signal pocessing, Tesis No. 1/011 [6] Logan J. Beens, Design, Analysis, and Constuction of an Equal Split ilkinson Powe Divide Maquette Univesity, Maste tesis of Electonices and Telecommunication, August 01 [7] Yaya S. H. Kaisat, Design of 4 Elements Rectangula Micostip Patc Antenna wit Hig Gain fo.4 GHz Applications, Intenational ISSN, Vol. 6, no.1, Januay 01 [8] P.Subbulaksmi and R.Rajkuma, Design and Caacteization of Copoate Feed Rectangula Micostip Patc Aay Antenna, IEEE Intenational Confeence on Emeging Tends in Computing, Communication and Nanotecnology, 013 [9] Balam Sau, Design and implementation of 4 4 Butle matix, ME micoelectonics,iis,bangloe [10] Muammad Mafuzul Alam, Md. Mustafizu Raman Soncoy, and Md. Osman Goni, Design and Pefomance Analysis of Micostip Aay Antenna, Pogess In Electomagnetic Reseac Symposium Poceedings, Moscow, Russia, August 009 [11] Eio Gandini, Mauo Ettoe, Ronan Sauleau, and Antony Gbic, A Lumped-Element Unit Cell fo Beam- Foming Netwoks and Its Application to a Miniatuized Butle Matix IEEE Tans. Micow. Teoy Tec.,VOL.61,NO.4,Apil 013 Reseac Publis Jounals Page 146