Brainboxes RS232 manual Antenna Characteristics, Gain, Radiation Patterns

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

315o

270o

225o

0o			0o
0 dBd			0 dBd
-10 dBd
		315o	-10 dBd
	o			o
-20 dBd	45
			-20 dBd	45

-30 dBd -30 dBd

90o 270o 90o

	135o	225o		135o
180o	horizontal polarisation		180o	horizontal polarisation
	vertical polarisation			vertical polarisation
		0o
		0 dBd
	315o	-10 dBd	45o
		-20 dBd

-30 dBd

270o 90o

225o	135o
180o	horizontal polarisation
	vertical polarisation

Manual for BL-521 5_3.doc © Copyright Brainboxes Limited 2004 Page 38 of 41