Compact Tripple U-Shaped Slot Loaded Circular Disk Patch Antenna for Bluetooth and WLAN Application

Transcription

1 9 VOL.6, NO., MACH Compact ppl U-Shapd Slot Loadd Ccula Dsk Patch Ata fo Blutooth ad WLAN Applcato J. A. Asa, Auag Msha, N. P. Yadav, P. Sgh, B.. Vshvakama Dpatmt of Elctocs & Commucato Uvsty of Allahabad, Allahabad,, Ida Dpatmt of Elctocs Egg I.. BHU, Vaaas, 5, Ida l: / E-mal: Abstact -I th pst pap a th U-shapd slot loadd dsk patch ata s aalysd by usg ccut thoy cocpt. h ata shows dual soac. h soac fqucy of sgl lay patch s foud to b.84 GHz ad.6 GHz (smulatd.8 GHz ad.6 GHz) whas fo two lays dlctc ata, t s. GHz ad 3.4 GHz (smulatd. GHz ad 3.3GHz) spctvly. h fqucy ato s foud to b.4 (smulatd.45) fo sgl lay patch ata ad.4 (smulatd.4) fo two dlctc lays patch ata. h badwdth of sgl lay patch ata s foud to b.5% ad.68 % fo low ad upp soac fqucy spctvly whl fo two lays dlctc ata t s. % ad.53 %. Itoducg th U-slot th ccula dsk 6.54 % of sz ducto has b achvd. h thotcal sults a compad wth th smulatd sults obtad fom IE3D whch a clos agmt. Idx m - Patch ata, U-slot loadd patch, dualbad ata ad two dlctc lays I. INODUCION Dug th ct yas th has b apd dvlopmt dualbad mcostp ata du to ts wd applcato may commucato systms. Som of th mpotat applcatos of ths kd of atas a Wlss Local Aa Ntwok (.4 GHz), sythtc aptu ada (SA), dualbad GSM/DCS 8 mobl commucato systm, Blutooth ad Global Postog Systm (GPS). Dualbad chaactstcs ca b achvd wth th sam stuctu by xctg two dfft mods wth sutabl fd pot [], usg stackd stuctus [], loadg actv stub [3], slots [4], coplaa mult coducto stuctus [5] tc. h boadbad chaactstc of a ctagula, ccula ad stackd U-shapd slot mcostp patch ata has b potd [6-9], whch two dfft but clos soat fqucs a sgl patch a combd to gv a wdbad opato. O th oth had, f th xctd soat fqucs a fa apat, a dual-fqucy opato ca b achvd wth th U-slot ata [-3], waabl txtl ata [4], also gv th dualbad chaactstcs. A slot ata has spcal advatag bcaus of ts smpl stuctu, such as wd badwdth, lss coducto loss [5-7]. A pob fd mcostp ata wth a tal U-shapd slot havg lag mpdac badwdth wth boadsd adato patt a potd [8-9]. I ths atcl, a w typ of th U-shapd slot loadd sgl ad two dlctc lays ccula dsk patch ata hav b poposd fo dualbad applcatos usg ccut thoy cocpt basd o modal xpaso cavty modl. h dmsos of th U-slot a chos such a way so that poposd ata ca xhbt IJMO---3 ISAM

2 9 VOL.6, NO., MACH dual fqucy bhavou wth good matchg codto. Vaous ata paamts a calculatd as a fucto of fqucy. II. CONFIGUAION AND ANALYSIS A. Aalyss of th U-shapd slot loadd Sgl lay patch ata U-slot ca b cosdd as combato of th slot as show Fg.. Amog ths, two vtcal slot a th ams of th U-slot havg dmso ( L W ) ad th thd o s bas of th U- slot ad t s hozotal ( L W ).h quvalt ccut of a aow slot compss a ss combato of adato sstac ( s ) ad th actv compot ( X s ) [-] as show Fg., (b) Sd vw Fg.. Gomty of th U- shapd slot loadd sgl lay patch ata s X s Fg.. Equvalt ccut of slot hfo th mpdac of th vtcal slot ca b gv as [] + jx () wh C + l( kl) C ( kl 6 kl C + l + C ) + s( kl) ( kl )-C ( kl ) [ S (kl ) S ( kl )] + cos( kl ) ad S X 3cos α C ( kl ) + cos( kl )[ S ( kl ) S ( kl ) s( kl )] kw L ( ) ( ) kl C kl C h (a) op vw h U-slot loadd patch duod Goud pla Coaxal fd whch C s Eul's costat.577, k s th popagato costat f spac ad fuctos ad as C a th s ad cos tgals dfd ( x) dx x s S ( x) x ( x) ad C x s ( ) dx x x Smlaly th mpdac of th bas slot ca b gv as [] S IJMO---3 ISAM

3 93 VOL.6, NO., MACH wh ad X + jx () C + l( kl 6 cos( kl ) - C ( kl ) + s( kl kl ) C + l + C S 3cos α C [ S (kl ) S ( kl )] ) ( kl )- C ( kl ) + ( kl ) + cos( kl )[ S ( kl ) S ( kl ) s( kl )] kw L ( ) ( ) kl C kl C wh L lgth of vtcal slot, L lgth of bas slot ad W wdth of vtcal slot, W wdth of th bas slot Hc th put mpdac fo U-shapd slot ca b calculatd fom Fg.3. Fg. 3. Equvalt ccut of U-shapd slot wh adato sstac of vtcal slot adato sstac of bas slot X actv compot of vtcal slot X actv compot of bas slot + U (3) whch Iput mpdac of vtcal slot X X X Iput mpdac of bas slot A dsk patch ca b aalyzd as th paalll combato of sstac, ductac ad capactac as show Fg.4, [3]. Fg.4. Equvalt ccut of ccula dsk patch ata wh ad C Q (4) π f L (5) π f Q h E j ( kx ) (6) P whch J ( kx ) Bssl fuctos of od x fd locato fom th ct of th dsk patch h thckss btw goud pla ad fd patch Q total qualty facto of th soato p total pow loss th cavty h soac fqucy of th dsk patch ata ca b appoxmatly dtmd fom th quato [4]. f k c m (7) π whch k m th zo of th dvatv of Bssl m fucto of od c vlocty of lght L C IJMO---3 ISAM

4 94 ffctv adus of th ccula dsk [3] dlctc costat of th substat. hfo, th mpdac of th patch wthout U- slot ca b dvd as (8) P + jω C + jω L Hc th total put mpdac of poposd ata ca b calculatd fom Fg. 5 as VOL.6, NO., MACH U U U3 L C (a) Fg.5. Equvalt ccut of th U-shapd slot loadd ccula dsk patch ata wh U PU (9) P + U U U 3 U U U3 + + U U3 U U wh U, U, U3 a th total put mpdac of th th U-shapd slot spctvly. h cut dstbuto fo poposd sgl lay dualbad ata s show Fg.6. h a two cuts flowg th patch, o s th tal patch ad aoth s aoud th slots, whch a sposbl fo th dual bad bhavo. (b) Fg.6. Cut dstbuto th U-shapd slot loadd sgl lay ccula dsk patch ata fo low ad upp soac fqucy (a) f.8 GHz (b) f.6ghz B. Aalyss of th U- slot loadd patch ata wth two dlctc lays h sd vw gomty of th poposd ata two dlctc lays s show Fg.7. IJMO---3 ISAM

5 95 VOL.6, NO., MACH h U-shapd slot loadd patch (fd patch) duod h h A Goud pla Coaxal fd Fg.7. Sd vw gomty of th U-slot loadd mcostp patch ata wth two dlctc lays h ffctv pmttvty fo dv patch fo ths ata s gv as [3]. + h + + () L wh h h + h whch h ad h a thckss fo two dlctc lays ad h h Now th valu of, L ad C fo ths cofguato ca b obtad by placg th valu of ffctv pmttvty ( ) ad thckss ( h ) wth ad h quatos (4), (5) ad (6). h total put mpdac of ths gomty ca b calculat as path slot ' () path + slot wh U U U 3 slot + + U U 3 U U 3 U U whch patch s th put mpdac of mcostp patch ata wth two dlctc lays ad slot s th total put mpdac of th U-shapd slot wth two dlctc lays. Usg quato (9) ad () o ca calculat th vaous ata paamts. h cospodg cut dstbuto fo th U-shapd slot loadd fo two dlctc lays a show Fg.8. (a) (b) Fg.8. Cut dstbuto two dlctc lays patch ata (a) f.ghz (b) f 3.3GHz III. ADIAION PAEN h adato patt fo th U-shapd slot loadd ccula dsk patch ata s calculatd by cosdg th poposd ata as ccula dsk patch [] jk E ( θ ) J k V J ( k s θ )]. cos [ J φ jk E ( φ ) J k V [ J J ( k s θ )]. cos θ s ( k s θ ) + + ( k φ () s θ ) wh V adatg dg voltag he J ( ) dstac of a abtay fa-fld pot adus of fd dsk patch (3) IJMO---3 ISAM

6 96 VOL.6, NO., MACH Fo two dlctc lay mcostp patch ata k k wh s th ffctv pmttvty fo dv patch. Substtutg th valu of k ad thckss ( h ) quato () ad (3) o ca calculat th adato patt fo two dlctc lays patch ata. b.5% fo low soac ad.68 % fo upp soac fqucy. Calculatd fqucy ato of upp to low soac fqucy (f /f ) s.4. h thotcal sults a good agmt wth smulatd o. IV. DESIGN AND SPECIFICAIONS abl. Dsg spcfcatos fo th th U-shapd slot loadd sgl lay patch ata abl. Dsg spcfcatos fo th th U-shapd slot loadd patch ata wth two dlctc lays latv pmttvty of th fst substat ( ) hckss of th fst dlctc substat ( h ) adus of th ccula dsk patch Lgth of th vtcal slots ( L ) 3 Lgth of th bas slots ( L ) 3 Wdth of th vtcal slots ( W, W, W ) 3 Wdth of th bas slots ( W, W, W ) 3 latv pmttvty of th scod substat ( ) hckss of th scod dlctc substat ( h ) Fd locato ( x, y ). (a). mm 3 mm 38mm, 3mm, 4mm 3mm,6mm,.mm 4. mm 4.mm.3 ( duod).5 mm (-.3mm,6.mm) Substat matal usd latv pmttvty of th substat ( ) hckss of th dlctc substat ( h ) adus of th ccula dsk patch ( ) Lgth of th vtcal slots L ) 3 Lgth of th bas slots ( L ) 3 Wdth of th vtcal slots ( W, W, W ) Wdth of th bas slots ( W, W, W ) 3 Fd locato ( x, y ) tu loss(db) - hotcal Smulatd duod.3.5 mm 3 mm 38 mm,3mm,4mm 3mm,6mm,.mm 4. mm 4.mm (-.3 mm,6. mm) V. ESULS AND DISCUSSION - h vaato of tu loss wth fqucy fo th U-shapd slot loadd sgl lay patch ata s show Fg.9 alog wth smulatd sults usg IE3D [5]. It s obsvd that th ata soats at two fqucs (f.84 GHz, f.6ghz, smulatd f.8 GHz ad f.6ghz) ad -db badwdth s foud to Fqucy(GHz) Fg. 9. Vaato of tu loss wth fqucy fo sgl lay patch ata alog wth smulatd sults (.3, h.5mm, 3mm) IJMO---3 ISAM

7 97 VOL.6, NO., MACH Smlaly fo two dlctc lays patch ata two soac fqucs a obtad as show Fg.... low soac fqucy s. GHz ad upp soac fqucy s 3.4 GHz. (smulatd.ghz ad 3.3GHz ). I ths cas th badwdth s.% ad.53 % fo low ad upp soac fqucy spctvly. h ato of th soac fqucs of two lay patch s foud to b hgh (.4) as compad to sgl lay patch ata (.4). It ca b obsvd that both thotcal ad smulatd badwdth s good agmt at upp soac fqucy whas th s slght dvato at low soac fqucy. tu loss(db) - - hotcal Smulatd Fqucy(GHz) Fg..Vaato of tu loss wth fqucy fo two dlctc lays patch ata alog wth smulatd sults(.,.3,h.mm,h.5mm,3mm) adato patt fo sgl lay mcostp patch ata s show Fg.. h thotcal sults show good agmt wth th smulatd sults of low soac howv, th s small dvato maxmum pow cas of upp soac fqucy as show Fg.. adatv pow(db) - hotcal Smulatd Agl (dg) Fg.. adato patt fo sgl lay dlctc patch ata fo low soac fqucy (f.86ghz) adatv pow(db) - hotcal Smulatd Agl(dg) Fg.. adato patt fo sgl lay dlctc patch ata fo upp soac fqucy (f.6ghz) adato patt fo poposd ata wth two dlctc lays at low ad upp soac fqucy s show Fg.3 ad Fg.4. I ths cas also th thotcal sults a good agmt wth th smulatd o. IJMO---3 ISAM

8 98 VOL.6, NO., MACH adatv pow(db) adatv pow(db) - hotcal Smulatd Agl(dg) Fg.3. adato patt fo two dlctc lays patch ata fo low soac fqucy (f.ghz) hotcal Smulatd Agl(dg) Fg. 4 adato patt fo two dlctc lays patch ata fo upp soac fqucy (f 3.4GHz) VI. CONCLUSION Fom th aalyss t s cocludd that th U- shapd slot loadd patch ca opat at two soac fqucs. Hc ths ata ca b usd fo dualbad opato whch spaato of soac s cotollabl wth th dmsos of th slot. EFEENCES [] W. F. chads, S. E. Davdso ad S. A. Log, Dual bad actvly loadd mcostp patch ata, IEEE as. Ata Popag., Vol. 33, pp. 5566, May 985. [] J. A. Asa, S. K. Duby, P. Sgh,. U. Kha ad B.. Vshvakama H-shapd stackd patch ata fo dualbad opato, Pogss Elctomagtcs sach B, Vol. 5, pp. 9-3, 8. [3] S. A. Dvso, S. A. log, W. F. chads, Dual bad mcostp atas wth moolthc actv loadg, Elctoc Ltt., Vol., pp ,spt [4] Wag E, A ovl dualbad patch ata fo WLAN Commucato, Pogss Elctomagtc sach C, Vol. 9, pp.93-, 9. [5] A. Msha, P. Sgh, N.P. Yadav, J. A. Asa ad B.. Vshvakaama, Compact shotd mcostp patch ata fo dualbad opato, Pogss Elctomagtc sach C, Vol. 9, pp.7-9, 9. [6] D. D. Ksha, M. Gopksha, C. K. Aaada, P. Mohaa ad K. Vasudva, Compact dualbd slot loadd ccula mcostp ata wth a supstat, Pogss Elctomagtc sach, Vol. 83, pp. 455, 8. [7]. Huyh ad K. F. L. Sgl lay sgl patch wd bad mcostp ata, Elctocs Ltt., Vol. 3, pp. 3-3, Aug [8] K. F. L, K. M. Luk, K. F. og, S. M. Shum, Huyh ad. Q. L Expmtal ad smulato studs of th coaxally fd U-slot ctagula patch Ata, IEEE Poc. Mcow. Atas Popag., Vol. 44, pp , Oct [9] H. A., Osma, E. A. Abdallah, A. A. Abdl ahm, A ovl boadbad compact ccula dsk mcostp ata fo wlss applcato, Pogss Elctomagtc sach Vol. 4, pp , 8. [] J. A. Asa,. B. am, Boadbad stackd U-slot mcostp patch ata, Pogss Elctomagtcs sach Ltts, Vol.4, pp.7-4, 8 [] J. A. Asa, S. K. Duby, P. Sgh,. U. Kha ad B.. Vshvakaama, Aalyss of U-slot loadd patch ata fo dualbad opato, It. J. Mcowav ad Opt. cho., Vol.3, pp.8-84, 8. []. Bhalla ad L. Shafa, soac bhavou of sgl U-slot ad doubl U-slot ata, Mcowav ad Optcal cho. Ltt., Vol. 3,pp ,. [3] Y. X. GUO, K. F. L ad K. M. A. Luk, dualbad patch ata wth two U-shapd slot, Mcowav ad Opt. cho. Ltt.,Vol. 6, pp , July. [4] P. Salo, Y.. Sam, H. Hum, M. Kvkosk, Dualbad waabl txtl ata, IEEE It. Symp. o Ata ad Popag. Soc.,pp, , Ju 4. IJMO---3 ISAM

9 99 [5] S. N. Ysa, H. H. Hs, H. K. Da, ad K..Chg Acuat Slot Ata, Assmbly. U S Patt No ,. [6] A. Axlod, M. Ksluk ad J. Maoz, Boadbad mcostp fd slot adato, Mcowav Joual Vol. 3, pp.8-84, 989. VOL.6, NO., MACH [7] H. G. Akhava ad D. M. Syahkal, Study of coupld slots atas fd by mcostp ls, h th Itatoal Cofcs o Atas ad popagato, 9-9, 999. [8] K. L Wog, ad W. H. Hsu, Boadbad tgula mcostp ata wth U-shapd slot, Elcto Ltt., Vol.33, pp , 997. [9] K. M. Luk, K. F. L ad W. L. am Ccula U- slot patch wth dlctc substat, Elcto Ltt., Vol.33, pp. -, 997 [] S. S. Shama ad B.. Vshvakama Aalyss of slot loadd ctagula mcostp patch ata, Ida J. ado Spac Phys. Vol. 34, pp , 5 [] Shvaaya ad B.. Vshvakama, Aalyss of cld slot loadd patch fo dualbad opato. Mcowav ad Opt. cho. Ltt., Vol. 48.pp ,Sp. 6. [] E. A. Wolf, Ata Aalyss. Atch hous, Nawood (USA), 998. [3]. Gag, P. Bhata, I. Bahl, ad A. Ittpboo, Mcostp Ata Dsg Hadbook, Atch hous, Bosto, Lodo, 3. [4] L. C. Ch t al., soat fqucy of ccula dsk ptd ccut ata, IEEE as. Ata Popag., Vol.5, pp , Apl 977. [5] lad softw, Ic., IE3D smulato softwa, vso 4.5, C A, 8. IJMO---3 ISAM