The RFI HPM‑RM‑077083 VHF Roof Mount Antenna is a compact, factory‑tuned ¼‑wave antenna covering 77 – 82 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 77 – 82 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 a 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 needing 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 × RFI HPM‑RM‑077083 VHF Roof Mount Antenna (77 –82 MHz).
Documents:
RFI HPM-RM Series Antenna - Datasheet
