60 liEl.L SYSTHM TECIIMCAL .lOlKX.IL 



it is generally impractiralile t(i employ moic than four reactance ele- 

 ments in either of the arms of a section. Likewise, a total of six 

 reactance elements in liolli the series anil slnnit arms is the maximum 

 that can he economically employed. 



T\|ies of two-terminal reactance meshes having not more than four 

 elements, are listed in Kii;. ."). In Fig. 6, the corresponding frequency- 



rrowri nrein 



— vistt/ — • It— ^ — >jifia/Hi — ■ — II — • o^ifli/-^ 1-^ 



12 3 i ^1 



-c>- -<i- -n^ -^^--o- -"O 



3b 6o 6b 7a 7b 



-C^ -^ -CS- 



-00- 



&d 

 I-ig. 5 — Two-Teriniii.il KiMclaiice .Meshes Containing .\ot .More Than Four Klements 



-CD 



A 



f/ <» 



IT 



1/ 1 



r 



5 6 7 6 



Fig. 6— Rc.ictancc-Frcqucncy Characteristics, of the Meshes of Fig. 5, Shown in 

 Symljolic F"orni 



reactance characteristics are represented. Reactance characteristics 

 N<)s. 1 and 2 of 1-ig. (> are reciprocal in nature, that is, their product 

 is a constant, independent of freciucncy. Reactance characteristics 

 Nos. 3 and 4 are similarK- relatetl if the frequencies of resonance and 

 anti-resonance coincide. Similar relations e.xist between character- 

 istics Nos. 5 and (», and between characteristics Nos. 7 and 8. Two 

 forms of reacl.incr mesh in Fig. ."> (Nos. .")a and .'jb) give the same 



