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m.iinly on the fact that a omipensuting lu-twork when used as a 

 neutrali/er enahles the ini|H-<lanie of a loailed line to simulate ap- 

 j)ro\inuitely the ini|H'tlance of a smooth line and hence to simulate' 

 at least roui;hl> a constant resistance, and when used as a simulator 

 enables the impedance of a smooth line to simul.ite approximately 

 the impedance of a loaded line. 



Foremost of the uses of the compensating networks is their etnploy- 

 mcnt for proix>rly connecting together a loaded line and a smooth line, 

 to reduce reflection eH'ects at the junction. This may be accomplished 

 either by means of the reactance compensator (Fig. 16) or by means 

 of the susceptance compens;Uor (Fig. 17) by adopting a suitable 

 relative termination for the loaded line in each method. In describing 

 these two methods, it will be assumed at first that the loaded line 

 and the smooth line are non-dissipative and have e(iual nominal 

 impe<lances. In the first method of compcnsaticm the loaded line is 

 terminated at (^-section with a in the neighljorhotid of 0.8, where 

 its curve of characteristic resistance is nearly flat; and a reactance- 

 compensator (Fig. 10) is inserted in series between the two lines. 

 This compensiitor, by neutralizing the reactance of the given loaded 

 line, makes that line appear like a smooth line; while, by simulating 

 the coniplementar\- characteristic reactance of the loaded line, it 

 makes the smooth line appear complementary to the given loaded 

 line. In the second methtid of compensation the loaded line is termi- 

 nated at ff'-load with a' in the neighborhood of 0.8, where its curve 

 of characteristic conductance is nearly flat; and a susceptance-com- 

 (lensator (Fig. 17) is inserted in shunt between the two lines at their 

 junction. This compensator, by neutralizing the susceptance of the 

 given loadefl line, makes that like appear like a smooth line; while, 

 by simulating the characteristic susceptance of the complementary- 

 loaded line, it makes the smooth line appear complementary to the 

 given loaded line. 



When, as actually, the lines are dissipative, the compensator con- 

 tinues to make the loaded line appear appro.ximately like a smooth 

 line, and to make the smooth line appear approximately like a loaded 

 line; but now, unless the lines happen to be about equally dissipative, 

 there will exist at their junction an irregularity arising chiefly from 

 incc|uality in their "excess-impedances." This irregularity can be 

 largely pre\ented from occurring when the gage of either or both of 

 the lines is at the disposal of the designer; when this is not the case 

 and the irregularity is seriously large, resort may be had to sjx'cial 

 equalizers termed "excess-impedance equalizers." 



