G21.B.3011111 Datasheet, PDF (9/23 Pages) Taoglas antenna solutions – Heavy duty screw mount

4. Antenna Parameters
4.2 Efficiency
60
50
40
30
20
— 0.3 meters
— 1.0 meters
— 2.0 meters
10
— 3.0 meters
— 5.0 meters
0
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
2100
2200
Frequency (MHz)
Figure 5. Efficiency of G21 Hercules antenna in free space.
4.2 Efficiency
60
50
40
30
20
— 0.3 meters
— 1.0 meters
— 2.0 meters
10
— 3.0 meters
— 5.0 meters
0
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
2100
2200 (MHz)
Figure 6. Efficiency of G21 Hercules antenna on 30 cm metal plate.
SPE-12-8-047/G/EZ | page 9 of 23