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Document Number: 45158
22
Revision: 26-Aug-10
VJ 3505
Vishay Vitramon
VJ 3505 UHF Chip Antenna for Mobile Devices
Fig. 4 displays the measured radiation patterns of VJ 3505 evaluation board in the YZ plane as defined in Fig. 2. Zero degrees
is defined at the Z axis, stepping clockwise.
Fig. 4 - Measured Radiation Pattern
FOOTPRINT AND MECHANICAL DIMENSIONS
The antenna footprint and mechanical dimensions are presented in figure 5. For mechanical support, it is recommended to add
one or two drops of heat curing epoxy glue. The glue dot should not overlap with any of the soldering pads. It is recommended
to apply the glue dot at the center of the antenna, as shown by the diagonal pattern. For more details see VJ 3505 assembly
guidelines section below.
Fig. 5 - VJ 3505 Footprint
30
60
90
120
150
180
210
240
70
300
330
0
- 10
- 20
- 50
- 40
- 30
500 MHz - Gain (dBi) vs. Angle (?
30
60
90
120
150
180
210
240
270
300
330
0
- 10
- 20
- 50
- 40
- 30
600 MHz - Gain (dBi) vs. Angle (?
30
60
90
120
150
210
240
70
300
330
0
- 20
- 50
- 40
- 30
700 MHz - Gain (dBi) vs. Angle (?
30
60
90
120
150
210
240
270
300
330
0
- 10
- 20
- 50
- 40
- 30
 862 MHz - Gain (dBi) vs. Angle (?
- 10
4.5
RF feed connects here
All dimensions in mm
Figure not in scale
35
0.25
0.25
1
1
1
9
9
9
1
Apply glue in this area
0.25
0.25
5
DIMENSIONS
(mm)
Length
35 + 0.5/-0
Width
5 + 0.5/-0
Height
1.2 ?0.1
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