0,4- 



S).3- 



r. 0.2- 



0.1- 



D/d = .24 



D/d = .38 



I ' I ' \ <■ 1 



0.25 0.50 0.75 1.0 



Ratio of Wavelength to Beam Width (L/B) 



Figure 21. Wave transmission data 



1.25 



57 



