ARM2DAB Mobile DAB Measurement Antenna
The ARM2DAB is a professional mobile omnidirectional antenna with magnetic base, specifically designed for radio-frequency measurement and monitoring while the vehicle is moving. It covers the complete DAB VHF Band III from 174 to 240 MHz, corresponding to a continuous operating bandwidth of 66 MHz and including all DAB blocks from 5A to 13F.
Its independent ground plane and omnidirectional radiation pattern provide uniform 360° horizontal coverage without requiring the antenna to be continuously repositioned. Typical applications include mobile field-strength surveys, DAB network verification, spectrum monitoring, interference investigation and professional measurements performed from equipped vehicles.
Rapid installation is achieved through three high-strength magnets positioned at 120° beneath the reference ground plate. When correctly installed on a suitable ferromagnetic vehicle surface, the antenna is designed for operation at vehicle speeds of up to 120 km/h.
A full UPVC protective radome protects the radiating structure against weather and mechanical impacts. All metallic parts are electrically connected to ground in a DC-grounded configuration.
Professional Applications of the ARM2DAB
- DAB measurements on the move: continuous monitoring from equipped vehicles
- Field-strength surveys: verification of received DAB signal levels across the service area
- Coverage verification: drive-test activities for DAB transmission networks
- Spectrum monitoring: mobile analysis of DAB VHF Band III
- Interference investigation: detection and analysis of anomalous or unwanted signals
- Temporary monitoring stations: rapid installation and removal without permanent vehicle mounting
- Emergency and special operations: professional activities requiring mobility and rapid deployment
Electrical Characteristics of the ARM2DAB
- Frequency range: 174–240 MHz
- Operating bandwidth: 66 MHz
- DAB blocks: 5A–13F
- Radiation pattern: omnidirectional
- Ground plane: independent
- Maximum gain: 2.2 dBi
- Return loss: ≥ −10 dB
- VSWR: ≤ 2.5:1
- Nominal impedance: 50 Ω
- Polarization: vertical
- Typical H-plane beamwidth at −3 dB: 360°
- Typical E-plane beamwidth at −3 dB: 80°
- Maximum input power: 500 W
- Connector: N female
- Operating temperature: −20 to +70 °C
- Electrical configuration: all metallic parts are connected to ground in DC
Mechanical Data, Materials and Accessories
- Antenna length: 400 mm
- Radome diameter: 85 mm
- Ground-plane diameter: 310 mm
- Weight without magnets: 2.5 kg
- Total weight: 4.1 kg
- Magnetic mounting: three magnets positioned at 120°
- Magnet diameter: 122 mm each
- Maximum vehicle speed: 120 km/h
- Protective cover: full UPVC radome
- Materials: aluminium, Teflon and polyvinyl chloride
- Material compliance: RoHS
- Packaging dimensions: 400 × 400 × 300 mm
- Optional BAG-01 transport case: polyvinyl chloride · 920 × 360 × 130 mm · weight 3 kg
The maximum vehicle speed requires correct installation on a clean, suitable ferromagnetic surface. The mounting condition must always be checked before use and periodically during professional operation.
Technical Documentation, Testing and Conformity
Each ARM2DAB antenna is individually tested and supplied pre-assembled for professional DAB measurement and monitoring applications.
- Factory test report
- Declaration of conformity
- Electrical and mechanical specifications
- Radiation diagram on the H plane
- Radiation diagram on the E plane
- Return-loss test curve
- RoHS material conformity information
- Installation, operating and safety information
The test documentation and radiation diagrams support the use of the ARM2DAB in professional field-strength surveys, DAB drive tests and mobile spectrum-monitoring systems.
FOR DAB MEASUREMENTS ON THE MOVE
Nf connector ( Power 500W )
FREQUENCIES: (A) 174÷240 MHz
TESTED AND PRE-ASSEMBLED
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