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Brainboxes RS232 User Manual Page 38

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Manual for BL-521 5_3.doc © Copyright Brainboxes Limited 2004 Page 38 of 41
13.5. Antenna Characteristics
13.5.1. Gain
The antenna is integral to the printed circuit board. It is a quarter-wave Planar Inverted-F Antenna (PIFA) with a gain
of -0.3 dBm.
13.5.2. Radiation Patterns
0
o
315
o
270
o
225
o
180
o
135
o
90
o
45
o
0 dBd
-30 dBd
-20 dBd
-10 dBd
horizontal polarisation
vertical polarisation
0
o
315
o
270
o
225
o
180
o
135
o
90
o
45
o
0 dBd
-30 dBd
-20 dBd
-10 dBd
horizontal polarisation
vertical polarisation
0
o
315
o
270
o
225
o
180
o
135
o
90
o
45
o
0 dBd
-30 dBd
-20 dBd
-10 dBd
horizontal polarisation
vertical polarisation
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