BELOW THE INTERFERENCE REGION 



101 



eho 



eu 



320 



300 



280 



250 



240 



220 



200 



180 



160 



140 



120 



100 



80 



60 



40 



20 



13 ie 17 18 19 20 



sd 



„ 21 22 



23 



24 



25 



I'^iGURE 38. e/i2 = f M versus sd = 



BOTH AN TENNAS LOW ' I < 30 x'^ 



.1 .2 .3 .4 .b .6 .7 .8 .9 10 



sd" SV 



Figure 39. ehi = eu versus sd = 



