HA.21.A Datasheet, PDF (19/25 Pages) List of Unclassifed Manufacturers – Embedded Helical Monopole Antenna

7. Antenna Application Note
7.1 Matching Circuit for Different Ground Lengths
7.1.1 HAD.A.21 EVB Board
HAD.A.21 Ceramic 4 Ceramic 5 Ceramic 6
160mm
0 ohm
2.2pF
0 ohm
150mm
0 ohm
2.2pF
0 ohm
140mm
0 ohm
2.2pF
0 ohm
130mm
0 ohm
2.2pF
0 ohm
120mm
0 ohm
2.2pF
0 ohm
110mm
0 ohm
2.4pF
0 ohm
100mm
0 ohm
2.4pF
0 ohm
90mm
0 ohm
2.4pF
0 ohm
80mm
0 ohm
2.4pF
0 ohm
70mm
0 ohm
2.4pF
1nH
60mm
0 ohm
2.4pF
1nH
50mm
0 ohm
2.4pF
1nH
7.1.2 HAD.B.21 EVB Board
HAD.B.21 Ceramic 4 Ceramic 5
160mm
0 ohm
2.2pF
150mm
0 ohm
2.2pF
140mm
0 ohm
2.2pF
130mm
0 ohm
3.3pF
120mm
0 ohm
3.6pF
110mm
0 ohm
open
100mm
0 ohm
open
90mm
0 ohm
open
Ceramic 6
5.6nH
9.1nH
9.1nH
10nH
10nH
2.2pF
2.2pF
2.2pF
DSP-15-8-SPE-16-8-016/B/WY Page 19 of 25