424 PROPAGATION THROUGH THE 
‘an’, 
! | 
Val (LAL Ali 
TAK: 
AA At 
NX 
VL YY, 
StH Rea oe 
LTT VATA 
ry 
CUTE Tt 
me DIN 
ASIEN 
ago iti 
ts 
LU 
NII 
= Ie 
HNO 
a Rae, 
att 
STANDARD ATMOSPHERE 
oN 
Sa 
aN EN Sil 
KASS 
L | HT \ ASA KCUIN 
TAN AN 
LT 
AN NT 
—————————————e— er 
1 SSSsSo eons a eS 
0s ee ee ee ae 
= Sie 
ttf 
HHH EN ® 
HAT SANNA 
A IN METERS 
Figure 53. | 6 | versus A for vertical polarization (see Table 
10). Dielectric earth, 6— oo; perfect conductor, 5—> 0. 
Phase of 6 is 45° for intersection of two asymptotes for any particular ground. 
From these limiting values of 7 the value of 7 in 
general for any given 6 can be found from the follow- 
ing two series, of which only the first is of interest 
in short-wave work. 
6 large, 
a 2 zs 1.5 42 
Be eae ae HOP we Lee Ge 
Teo 3 Tyco 2 Bia 
tooo (195) 
6 small, 
one j 
Tn = Tn, = 
i r 27,0 8710 
1 3 3/2 
= 1+ a) HO 5 6104 
al 47, 
4. The height-gain functions f(h). 
(a) For low antennas (h < 30d*’%), the height-gain 
