230 



BELL SYSTEM TECHNICAL JOURNAL 



FILTER 

 NO 



^^ 



M \ 



\r 



FREQUENCY OD 



ni 



!T 



-/=^ 



tr 



y ^ 



j:r^ 



KM^rs 





K 



1/ 



NOTE - IN COLUMN D, DOTTED LINES INDICATE REACTIVE IMPEDANCE 

 SOLID LINES INDICATE RESISTIVE IMPEDANCE 



Fig. 6- — Single band lattice filters employing more than one crystal 

 in the impedance arms. 



