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920MHz Band Wireless Device (Korea) USERS MANUAL EM-9121 Rev. 1
9.3 DIRECTIONALITY AND POLIRIZATION PLANE OF ANTENNA
An antenna has a direction where it readily transmits or receives radio wave, which is called directionality.
The directionality depends on antenna types.
■
SLEEVE ANTENNA FOR WIRELESS I/O WL40KR SERIES
The following figures show the directionality of the sleeve antenna.
The sleeve antenna is omnidirectional in a horizontal plane.
E_PLANE
—— 915MHz
0
30
60
90
120
150
180
210
240
270
300
330
-10
-10
-20
-30
-40
-20
-30
-10
10
0
0
H_PLANE
—— 915MHz
0
30
60
90
120
150
180
210
240
270
300
330
-10
-10
-20
-30
-40
-20
-30
-10
10
0
0
[E-Plane]
[H-Plane]
X-axis
Y-axis
Z-axis
XY plane
XZ plane
Figure 9.2 Directionality of sleeve antenna for WL40KR series <reference>