Furuno GN-86F User Manual page 25

This graph shows the directivity pattern. You can observe directivity has influence by implementation
position on the PCB.
PCB#
300
270
1
240
300
2
270
240
300
3
270
240
Figure 3-12 Directivity Pattern (25 mm x 25 mm Size Patch Antenna)
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FURUNO GPS/GNSS Receiver 86/87 Series User's Design Guide
Y-Z Plane
0
10
330 30
5
0
-5
-10
60
-15
-20
-25
-30
90
-35
120
210 150
180
0
10
330 30
5
0
-5
-10
60
-15
-20
-25
-30
90
-35
120
210 150
180
0
10
330 30
5
0
-5
-10
60
-15
-20
-25
-30
90
-35
120
210 150
180
Z-X Plane
330
300
270
240
210
330
300
270
240
210
330
300
270
240
210
21
SE13-900-001-06
0
10
30
5
0
-5
-10
60
-15
-20
-25
-30
90
-35
120
150
180
0
10
30
5
0
-5
-10
60
-15
-20
-25
-30
90
-35
120
150
180
0
10
30
5
0
-5
-10
60
-15
-20
-25
-30
90
-35
120
150
180