G21.B.3011111 Datasheet, PDF (7/23 Pages) Taoglas antenna solutions – Heavy duty screw mount

4. Antenna Parameters
4.1 Return Loss
0
-5
-10
-15
-20
— 0.3 meters
— 1.0 meters
— 2.0 meters
-25
— 3.0 meters
— 5.0 meters
-30
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
2100
2200
Frequency (MHz)
Figure 2. Return Loss of G21 Hercules antenna in free space.
0
-5
-10
-15
-20
-25
-30
700
— 0.3 meters
— 1.0 meters
— 2.0 meters
— 3.0 meters
— 5.0 meters
800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
2100
2200 (MHz)
Figure 3. Return loss of G21 Hercules antenna on 30 cm metal plate.
SPE-12-8-047/G/EZ | page 7 of 23