The RFI HPM-RM-148156 VHF Roof Mount Antenna is a compact, factory-tuned ¼-wave antenna covering 148-156 MHz with a VSWR 1.8:1 and a gain of -3 dBq. Measuring less than 440 mm in height and designed to fit the industry-standard MB9 roof-mount base, it solves clearance issues where a conventional quarter-wave whip cannot be installed. A moulded lower section and helically wound stainless-steel upper whip deliver exceptional flexibility and durability for harsh industrial and mining environments.

Product Features:

• The helically loaded ¼-wave radiator provides full VHF performance in a low-profile form factor under 440 mm tall.
• It is factory tuned for 148 - 156 MHz (other HPM-RM models cover 70 - 87 MHz and 148 - 174 MHz bands).
• The moulded base section and flexible stainless-steel whip withstand impacts, constant vibration, and tight overhead clearances.
• The standard MB9 roof-mount interface enables quick, secure installation on vehicles and fixed sites.
• It offers a typical gain of -3 dBq with VSWR 1.8:1 to ensure dependable signal quality across the targeted band.

Application Areas:

• It is ideal for mining trucks, loaders, and underground machinery operating beneath low ceilings or in tunnel networks.
• It is suitable for fleet cars, utilities, and emergency-service vehicles requiring a low-profile VHF antenna without compromising performance.
• It performs reliably in industrial plants and warehouses where cranes, pipes, or gantries limit antenna height.
• It benefits rural and remote communications systems that need rugged, flexible antennas for VHF voice and data links.
• It is perfect for any roof-mount installation restricted by overhead obstacles where a standard quarter-wave whip is impractical.

In the Box:

• 1 x RFI HPM-RM-148156 VHF Roof Mount Antenna (148-156MHz).

Documents:

RFI HPM-RM Series Antenna - Datasheet