A Conforma D FDFD genmode Metod for Wave Port ctaton and -Parameter tracton n 3D FDTD muaton Yong Wang and cott Langdon ong.wang@remcom.com scott.angdon@remcom.com Remcom Inc. 35. Aen t. ute 46 tate Coege PA 68 UA Te: -84-86-99 Fa: -84-86-38 saes@remcom.com www.remcom.com Remcom Inc. A rgts reserved.
Motvaton of Ts Wor tarcased meses Conforma meses
D FDFD genmode Metod and 3D Conforma FDTD Metod Y.Zao K.L.Wu and K.M.Ceng A compact D fuwave fnte dfference frequenc doman metod for genera guded wave structure I Trans. on Mcrowave Teor Tec. vo. 5 no.7 844-848.. Bener N. Cavannes and N. Kuster A new 3- D conforma PC FDTD sceme wt user-defned geometrc precson and derved stabt crteron I Trans. on Antennas and Propagaton vo. 54 no. 6 843-849 June 6. red green bue bue Conforma ce edges and areas
Conforma D FDFD genmode Metod zz zz zz zz zz zz zz zz
Conforma D FDFD Metod Cont d / / / / / / / / / / /
genmode quaton Lnear equaton: A f f genvaue: / genmode: f T Boundar Condtons: PC/PMC/ABC
Mcrostrp ectrc Fed Profe
T Mode of Crcuar Wavegude T T
TM /TM Mode of Crcuar Wavegude TM TM
Propagaton Constants Crcuar Wavegude Anatca tarcased Conforma T.888.893.8969 TM.7998.7866.7997 TM.9.37.9 Dfferenta Par. mm. mm. mm.3 mm ven mode.989.995.9.99 Odd mode.65.639.66.6 ven AD.879.873.8744.8758 Odd AD.59.5743.56.5493
ven/odd Modes of Dfferenta Par ven mode Odd mode
Desgned Wavegude Port feds from FDTD space ABCCPML z fed from port ensors ctaton sources from D sover Y. Wang and. Langdon Desgn of wave ports n FDTD and ts appcaton to mcrowave crcuts and antennas I Antennas and Propagaton mposum Toronto Canada.
-Parameter tracton ds t z t V T T s p ds t z e t I p s T T ' ' I I V V Z Z I Z V a Z I Z V b W. Gware and M. Ceuc-Marcsa Wde band -parameter etracton from FDTD smuaton for propagatng and evanescent modes n nomogeneous gudes I Trans. on Mcrowave Teor Tec. vo. 5 no. 8 9-98 3.
Comparson of muated and Measured Resuts Return oss and transmsson oss of te crcuar wavegude wt a crcuar rs cacuated vs. measurement Cacuated[7] Measured[7] Conforma 9 Gz -.87 -.66 -. 9Gz -6.83-7.458-5.938 Gz -.873 -.96 -.49 Gz -4.539-4.8-3.67 [7] R.W. carsten and A.T. Adams Tc crcuar rs n a T mode crcuar wavegude I Trans. Mcrowave Teor Tec. vo. 36 59 53 988.
-Parameters db A Crcuar Wavegude Wt a Crcuar Irs - - -3-4 Proposed Proposed measured [7] Measured [7] -5 8.+9 9.+9.+.+.+.3+.4+ Frequenc z -parameters of te crcuar wavegude wt a crcuar rs cacuated b te proposed metod vs. measured data
Fed napsot of te Crcuar Wavegude wt a crcuar Irs ctng from port Propagatng Refecton and transmsson Convergence
Dfferenta Par wt ot Lne and tubs Dfferenta par Va af-waveengt sot Quarter waveengt stub [9].. Cuang; T. L. Wu A new common-mode MI suppresson tecnque for Gz dfferenta sgnas crossng sotted reference panes I Internatona mposum on ectromagnetc Compatbt Ju.
Common Mode -Parameter -5 - -5 - -5 cc cc XFdtd cc XFdtd cc FM [9] cc FM [9] cc Measured [9] cc Measured [9] -3 5.+8.+9.5+9.+9.5+9 3.+9 3.5+9 4.+9 4.5+9 5.+9 Inserton and return oss of common mode for te dfferenta par wtout stubs compared wt measurement
Common mode -parameters Common Mode -Parameter cont d -5 - cc -5 - -5-3 5.+8.+9.5+9.+9.5+9 3.+9 3.5+9 4.+9 4.5+9 5.+9 Frequenc Gz cc Proposed cc Proposed cc FM [9] cc FM [9] cc Measured [9] cc Measured [9] Inserton and return oss of common mode for te dfferenta par wt stubs compared wt measurement
Radaton Pattern of orn Antenna Te cacuated 3D radaton pattern of te orn antenna at Gz b te proposed metod [] K. Lu C.A. Baans C.R. Brtcer and G.C. Barber Anass of pramda orn antennas usng moment metods I Trans. on Antennas and Propagaton vo. 4 no. 379-389 993.
Rectanguar Wavegude and orn Antenna Propagaton constants of propagaton modes of rectanguar wavegude T T T T TM Anatca.96.6363.4968.33 Proposed.98.6395.53.33 Te gan of te orn antenna cacuated vs. MoM and measurement 9 Gz Gz Gz Proposed 9.43.8.95 MoM[] 9.98.63.46 Measured[] 9.7.46.4
Return Loss of te orn Antenna 8.+9 9.+9.+.+.+.3+ - - proposed measured [] MoM [] -3-4 -5-6 Frequenc z Te broadband return oss of te orn antenna vs. MoM and measured resuts
Comparson of Return Loss of te orn Antenna Proposed vs. MoM and Measurement 9 Gz Gz Gz Proposed -7.348-3.378-37.84 MoM [] -8.93-3.47-36.37 Measured [] -6.444-3.74-34.5
Coa CPW strpne / oter wavegudes Connect to an crcuts/ antennas Oter Appcatons
Concuson A conforma D FDFD genmode sover was deveoped for arbtrar saped nomogeneous wavegudes. Te propagaton constants obtaned b te conforma D sover agree we wt tose cacuated b te anatca soutons starcased D FDFD and oter crcut sovers. Te egenmodes obtaned b te conforma D FDFD sover can be used to ecte varous transmsson nes and etract te moda -parameters for conforma 3D FDTD sovers.
Acnowedgment Professors B. Wang and X. Wang of Unverst of ectronc cence and Tecnoog of Cna Professor K. L. Wu of Te Cnese Unverst of ong Kong Coeagues Jonatan Fetcer am ede Jeff Barne am Abarano and tefane Lucas