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HELL SYSTEM TECHNICAL JOURNAL 



found capal)le of meeting the ideal impedance requirements. If 

 desired, the structures for the MM'M"-types and higher orders can 

 easily be derived by the regular operations indicated. In them some 

 slight reductions in the number of elements can be made because there 

 are then three or more similar impedances in one branch. 



A^(mpn') 



-I 



-I 



Uk 



y\,j^cm,Trii 



i|X,;t,('W,7r2''j 







^zh. 



\/ 



Characteristics of il/M'-type wave-filters; 

 m = .7230, m' = .4134. 



Broken lines indicate the effects of 



(iru(/») and Wik{m) are illustrated in Fig. 7 

 dissipation.) 



It should be quite obvious that a wave-filter of any order reduces 

 to the "constant k'" wave-filter when every one of its parameters 

 reaches its limiting value, unity. 



1.9 Frequency Relation in the Attenuation Characteristic of an 



M-Type or Higher Order Wave- Filter of Any Class 

 The attenuation characteristics of J/-type and .l/.l/'-type wave- 

 filters which have been illustrated in a limited frequency range show 



