42 BELL SYSTEM TECHNICAL JOURNAL 



Band Pass Wave-Filters of Ladder Type 

 Three Element Structures 



V. /!„=<), /,»-/». 



L, C 1 C 1 



c — imr^ 



§l 2 



l2 lr 



r I r r \ a r r W— - „ ,. „' Li— Lik~ 



d=C 



T/2(/2-/l) 



/ 2 -/l 



4^/2 



lirfiftR 



4*flf2 



c 2 =- 



/l 



VI, 



4^/^ ~ z irMfr-MR 



VI. /i»=/i, / 2oo =co. 



L, C 1 L 'i 



-^fflK^- -? ° ^^P —; 



Lo oJ — i — C? 



=^C? vi 2 



T 



, T R r , i r ,_ R T (h-h)R 



7r(/ 2 -/i) ' *Ux+h)R ' *(/,+/,) ' 4^ 



Cl= 



C 2 = C 2 fc = 



1 



H-H 



A-KtfR ^ "" *(f*-fi)R 



Four Element Structures 



VII. " Constant £," /io= = 0, / 2 ,= °°, jfe = fl. 



Llk C ,! k r X , _ih-h)R 



VII, = VIIi 



L-2k otok 1 



^ / 2 ~/i /- 



1 



4^/^ w * *(f*-fi)R 



VIII, 



Li C 



VIII. / to =/i. r / ^KTs 



L, 



1 g \_ villa 



zr c 2 



T 



} 



U=J=C S 



, (1-wr) 

 -L! = miLik,iL 2 — — j Lik, 



r C ^ r - 4 rn 2 r 

 C-i , C 2 — -z :,Cife. 



ra 2 1 — m 2 - 



r 4w 2 r T _Lik 

 Li — z. ^L-2k, Li , 



1 — m<? ra 2 



C,= 



— : C 2 fe, C 2 = m i C 2 fe. 



4ffli 



Wi=— rm 2 , w 2 : 



72 



/l. 



/l 2 



s* 



/ 2 2 



