COUPLED HELICES 



149 



Fig. 2.4.4 — Beat phase-constant plotted as a function of /3oa cot ^i . These 

 curves result from the solution of the field equations given in the appendix. For 

 b/a = 2.0. 



the case with dielectric between them having a relative dielectric con- 

 stant e' = 4, and 2) the case of no dielectric. The pitch angles of the two 

 helices were \p and —xp, respectively; i.e., the helices were assumed to be 

 synchronous, and wound in the opposite sense. 

 ■ Fig. 2.7 shows a plot of the ratio of /3,,.//3, to ^d^ versus /3o (f//2) cotiA, 



1.00 



0.80 



to 

 n 



«5. 0.60 



II 

 m 



i 0.40 



0.20 



0.5 



1.0 



f.5 



2.0 2.5 



/JoacoT;^, 



3.0 



3.5 



4.0 



4.5 



Fig. 2.4.5 — ■ Beat phase-constant plotted as a function of (3o« cot ^\ . These 

 curves result from the solution of the field equations given in the appendix. For 

 Va = 3.0. 



