G21B301111 Datasheet, PDF (5/22 Pages) List of Unclassifed Manufacturers – G21 GSM Hercules Gen.II Penta Band Cellular Antenna Screw-mount GSM/GPRS/CDMA/EVDO/UMTS/HSPA/WCDMA 850/900/1800/1900/2100 MHz

4. ANTENNA PARAMETERS
4.1 Return Loss
Figure 2. Return Loss of G21 Hercules antenna in free space
Figure 3. Return loss of G21 Hercules antenna on 30 cm metal plate.
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