APPROXIMATE NETWORKS OF ACOUSTIC FILTERS 339 



ELEMENT 



-^IKJCOM^- 



STRUCTURE NO. I 



L = 



P\' 



VALUES OF CONSTANTS 



V = 1 -+- l.355r 

 S = TTr2 



STRUCTURE N0.2 



/J 



VALUES OF CONSTANTS 



V = 1 + 1.355 r 

 S = TTr2 



ELEMENT 



p\- I'S 



VALUES OF CONSTANTS 



V= X + 0.785 r 

 S = TTr2 



ELEMENT 



L=^ C=^ 

 2S /0C2 



STRUCTURE NO. 5 



-^t t-- 



2/-h— '^ 



VALUES OF CONSTANTS 



Log 



m). 



0.46 



t 



r2t 



(r2-r2)T.lX 



(^i-f) 



T + - 



vft 



S = n 



Log 



m)^°-^^ 



ELEMENT 



STRUCTURE NO. 3 



-\2^ 



<Ty ^<Z0^= 



V, = l|+o.785ri S|=Trr 



■I- M 



I -^1-'" I 



/OV Vs 



L=^ Cr p , -, 



S 2pc-^ \p = lp+0.57r? Sp=nr| 



ELEMENT 



'-2S %C2 



STRUCTURE NO. 6 



Y\-Y^Y 



12-12"" 



I 2 02— It f 2 



V| = l|+ 0.785r, S|r:Tirf 



VALUES OF CONSTANTS 



l'2-\2 



VALUES OF CONSTANTS 



S2:TTr2 



1=' 



i2^+3i'fr2 



^si^^^ 



|1'|)+1'3S2] 



(i',3+3i'i r|)s I S2+3sfvf 1-2+1' i s| 



3(S21|+1'2S|J 



3S2[S|1',+S2l2] 



S = ' 



/2sfs2[S|S2(v|+3Vfl2)+3sfl',l'|+s|lf] 



3(S2V, + V2S,)^ 



s = 



382(5,1', +8212) - 



(V,3^3l', I'l) 



[vr+3V, I'l ) s,S2+382v2v2 + r|s|| 



Table I 



