VHF-137A VHF antenna
Product introduction: VHF-137A type VHF antenna, operating frequency band: 108MHz to 137MHz, maximum withstandable output power: 1000 watts, antenna gain: 2.15dBi, antenna bandwidth: 19MHz, antenna impedance: 50 ohms, voltage standing wave ratio (VSWR): less than or equal to 1.5, polarization method: vertical polarization, antenna connector: female N-type, antenna length: 0.9 meters, antenna weight: 1.3 kilograms.
The three aluminum support rods for this antenna configuration are responsible for transmitting VHF antenna RF signals. Without installing this part, the VHF antenna's voltage standing wave ratio (or return loss) will be very high, and it cannot function properly.
The following figure shows the installation diagram of the antenna. The height of the antenna bracket is generally around 1.5 meters (the height of the antenna bracket can be adjusted according to the actual application scenario). Additionally, a 60-centimeter-long, 6-centimeter-diameter stainless steel pipe needs to be prepared to assist in the installation of the VHF antenna.