Introduction：
BBAK 9137 + VHA 9103B is a 450MHz biconical antenna combo from Schwarzbeck, Germany, which is authorized by EUTTEST Shenzhen to provide products with tax included quotation and after-sales service. This biconical antenna has dipole-like characteristics (e.g. circular directivity pattern in the H plane, "8" pattern in the E plane, fixed phase center, comparable gain, and other directivity characteristics) and achieves a huge wide bandwidth with the biconical element, the use of which requires that the two parts of this antenna, the balun and the biconical antenna elements are combined and used together.
VHA 9103B is the upgraded model of VHA 9103 in 2024, they have the same parameters.
Technical data for BBAK 9137 and VHA 9103B:
| Antenna Model | bbak 9137 + vha 9103b |
| Antenna name | Biconical antenna |
| manufacturer | Schwarzbeck |
| agent | EUTTEST |
| Test frequency range | 30MHz-300MHz |
| antenna polarization | biometrics |
| cross-polarization | >20dB |
| Antenna Output Gain | -17dBi to 1.5dBi |
| radiance factor | 9dB/m to 24dB/m |
| weight | 1.8 kg |
| Length of Barron VHA 9103 B | 0.53 m |
| Width of biconical element BBAK 9137 | 0.92 m |
Graph of related technical parameters：
Output gain graph
