()34 



THK HKLI. SYSTEM TECHNICAL JOlTliXAL, MAY lO")? 



Throughuut the volume coiiiiuoii to the aiiteniui patterns, A « 1, p 

 « a and z < a/2. Then 



a 



(4) 



It is evident that A is constant and equal to p/a when the point (p, z) 

 is located on a cylinder with axis TR and radius p. It is this feature that 



*-z 



Fig. 6 — Grazing angle A at a layer. 



I 



Fig. 7 — Idealized antenna patterns used in this study. 

 6pz 



dV, = 2(y-a)/3/9,dA 



dV, = 2 a 



Pz 



'^--\- e+J^^^^^^ 



Fig. 8 — Integration over the common volume. 



