UW E&CE 476 S. Svi-Neii, Wie 7 Isuco: S. Svi-Neii Tie:.5 hous E&CE 476 Ae d Wieless Syses Fil Exiio Apil, 7, :3 3:p P. Ae # Ae # λ /5 λ /5 λ /5 Ae # 3 Thee pllel ideicl eso dipoles wih he legh d dius give y L.478λ,.λ e loced hee coes o equilel igle wih side legh λ / 5. Assue h he sel ipedces Z, Z Z o ll es e equl o 73 ohs he eso ipu ipedce o, 33 ech o he i he sece o he ohe wo elees. The uul ipedces Z, Z 3, L c e oied o he plos Fid he ipu ipedce o he e # whe he es # d # 3 e eied wih lod ipedces ZL d Z L especively. Fid he ipu ipedce o he e # ude wo codiios: oe o he es is sho cicuied d he ohe e is ope cicuied, d oe o he es is sho cicuied u he ohe oe is eied y 73 oh lod. c I he e # is ed y p cue souce, id he ol died powe o he cses d o he Secio. Assue h h es e de o lossless eil o ohic loss. Hi: I cse, p o ipu powe is cosued y 73 oh lod. P. Deeie he diesios o opiu gi pyidl ho e wih sque peue which c poduce db gi equecy o GHz. Assuig h he sque peue is ceeed he oigi d lyig o he xy-ple, dw ough plo o olized diio pe i yz-ple o 9 s ucio o. A 9 c diee polic eleco e, wih ocl legh o 45 c, uses his ho s eed. The eleco e peue disiuio geeed y he sque ho c e odeled y polic pe o pedesl ucio. Esie Hl-Powe Be-widh HP, Side-Loe Level SLL, d he gi ssue peue eiciecy o 75% o he polic eleco e syse.
UW E&CE 476 S. Svi-Neii, Wie 7 P.3 I 5.8 GHz wieless LAN li ewee ccess poi sie d he oile ode eceive i ee spce, sie uses 6 db gi e which dies W o RF powe. The eceive e gi is 3 db. The disce ewee sie d he eceive is. Assuig peec polizio lige d ipedce chig, id he eecive eceivig peue e o he eceivig e d he eceived powe ude his idel codiio. Deeie he eceived powe i he ccess poi sie is loced heigh o 3 ove l goud d he eceive is ove he se goud. The hoizol pllel o l goud disce ewee he es is. Boh es e ssued o e veiclly polized d oieed wih espec o l goud ple. The olized pe ucios e 4 ccess poi d oile, whee is esued o he pepedicul diecio. The goud dielecic cos is ssued o eε 5ε. c I wll o heigh 5 is plced ewee he ccess poi d oile esie he eceived sigl powe y he oile. P.4 I cellul dio ewo, hexgol cells wih cluse size7 d 3-seco cell secos e used o cove 5 -sque u e. Avege ue o clls pe hou ove he eie covege e is, wih vege duio o iues. The ol ue o ic dio chels i he chose sdd is 6. The equied locge e GOS is %. Wh is S/I o he chose cell lyou use ph-loss expoe4. How do you ssig he equecies o ech cell d is hee su-cells. Clcule he vege ic lod desiy Elg/-sque oeed o he syse. c Deeie he xiu cell dius d he ol ue o cells equied o cove he eie egio. d Fo.9 GHz dio ewo wih he ove cell lyou, use COST 3-H ediu ciy odel o clcule he equied se sio sie powe o poduce iiu -9 db edi level eceived sigl powe he oile eceive he oudy o he cell wos cse, ssuig 5 d gi se sio e wih he eecive heigh o 3 [] d db gi eceivig e wih eecive heigh o.5 [].
ECE 476, U. o Weloo S. Svi-Neii, Wie 7 Fouls Ae elee ipedce i y evioe: N e A A Z I I Z I V Z j N N,,,, L α α Rdiio o ecgul peue o diesios d log x- d y-xes is he ield he cee o he peue: E π π E e j E E e j E j j y-polized peue ield Ho e wih he peue diesios d : 6.4 λ G D opiu gi ho Poloidl eleco es: Equio o he suce: o ρ Apeue illuiio: ] [db log log [db] F E ρ ρ Edge illuiio: ] [db log log [db] db F E C ρ
ECE 476, U. o Weloo S. Svi-Neii, Wie 7 Gi o peue e: G e p Releco e lysis/desig les G u e p 4π λ A p λ / Z Eecive eceivig e: A e, G, [ ], eceived powe: Pec Ae Ei 4π λ Fiis oul: P ec p P,, Γ Γ G G [W] 4π [W]
ECE 476, U. o Weloo S. Svi-Neii, Wie 7 Diec y P ec RCVR? XMTR P h ψ Γ Releced y ψ h Γ Relecio Coeicie h d Fl Eh Model Ph Loss Fco: Goud elecio coeicies: Γ Edge Dicio: X c h c v F ε ψ ε ψ d λ d d Γ e jφ ε ψ ε ψ j jφ j e Γ e Diec LOS y Receivig e Tsiig e h c h h Asoig scee h d d d 3
ECE 476, U. o Weloo S. Svi-Neii, Wie 7 log Fd [db] 6 LOS ph Osuced ph 8 4 6 8 3. 5. 5. 5 X c < 4
ECE 476, U. o Weloo S. Svi-Neii, Wie 7 D Co-chel euse io: q 3N R S Co-chel ieeece: 4 4 3-seco cells I q q.7 Tic peseed y he uses o he ewo: A u µt / 6 [Elgs] pe use A QT / 6 [Elgs] Nue o uses U A /, Ae o hexgol cell:.6r A u Epiicl odels geel: Pec [db] EIRP[dBW] G 3.45 log [MHz] log d[] F[dB] EIRP [dbw] G [db] P [dbw], L [db] 3.45 log [MHz] log d[] F[ db] Ouu-H odel: L, u[db] 69.55 6.6log [MHz] 3.8log he[] he[] 44.9 6.55log he[] log h [db].log.7 h.56 log.8 Geel o: [ ] 3. 5 d[] Sll/Mediu ciy: e e Lge ciy: he [db] 8.9 log.54he. o 3 MHz he [db] 3. log.75he 4.97 o 3 MHz Suu/Rul: L5, su [db] L5, u log / 8 5.4 L5, qo [ db] L5, u 4.78 log 8.33log - 35.94 L db] L 4.78 log 8.33 log 4.94 5, o [ 5, u h Rge o pees: 5 [MHz] o 5 [MHz], e 3 [] o [], e [] o [], d o 3 [] COST-3 H odel PCS: L 5, u [db] 46.3 33.9log 3.8log he he 44.9 6.55log he log d c 7.3 c db ediu sized ciy/suu/odee ee desiy, 3 db o eopoli cees Rge o pees: 5 [MHz] o [MHz], he 3 [] o [], he [] o [], d o [] Useul s d elios: 8 c 3 [/s], λ c/, π / λ, ε /36π [F/], Z µ / ε π 377[ Ω] P[dBW] logp[w], P[dB] logp[w] P[dBW] 3 v[dbv] logv[v], v[dbµ V] logv[ µ V] v[dbv] E[dBV/] log E[V/], E[dBµ V/] log E[ µ V/] E[dBV/] 9 h µ 4π 7 [H/], 5
ECE 476, U. o Weloo S. Svi-Neii, Wie 7 Tic Tles [Elg] 6