Simatic Rf600 - Siemens SIMATIC RF600 System Manual

Antennas
6.3 RF660A antenna
The radiation diagram is shown for horizontal alignment and for a center frequency of 865
MHz. Horizontal antenna alignment is provided when the TNC connection on the antenna
points vertically up or down.
The radiating/receiving angle of the antenna is defined by the angle between the two -3 dB
points (corresponding to half the power referred to the maximum performance at a 0° angle).
The optimum radiating/receiving angle is therefore approximately ±30 degrees.
Figure 6-14 Directional radiation pattern of the antenna (at 865 MHz, horizontal alignment)
USA (FCC)
The radiation diagram is shown for horizontal alignment and for a center frequency of 915
MHz.
The radiating/receiving angle of the antenna is defined by the angle between the two -3 dB
points (corresponding to half the power referred to the maximum performance at a 0° angle).
The optimum radiating/receiving angle is therefore approximately ±35 degrees.
178 System Manual, 06/2010, J31069-D0171-U001-A10-7618
Draft Version 02.06.2010

SIMATIC RF600