The Diamond M285H VHF mobile antenna is a commercial-grade, high-performance vehicular radiation element engineered to deliver elite signal propagation and extended range across the professional Very High Frequency spectrum. Spanning a physical length of 1.40 meters and weighing an optimized 200 grams, this premium mobile whip utilizes a highly efficient 5/8λ (five-eighths wavelength) architectural typology. This structural configuration lowers the radiation angle toward the horizon, making it an essential high-rotation operational procurement component for commercial transport logistics, public safety fleets, field engineering vehicles, and high-volume B2B radiocommunication wholesale distribution channels across European markets.
The advanced electrical engineering of the M285H features a continuous operating bandwidth spanning 134 to 174 MHz, allowing precise frequency targeting. Accompanied by an official factory field-tuning cutting chart, installation technicians can easily trim the stainless steel whip element to achieve a perfect resonant frequency match with an ultra-low VSWR of less than 1.5:1. Engineered to manage punishing power thresholds up to 250 Watts maximum power rating with a nominal 50-Ohm system impedance, it yields a powerful 3.4 dB signal gain metric. Pre-terminated on a standardized, heavy-duty UHF-Male (M-P / PL-259) connector interface base, it guarantees a rigid mechanical bond and absolute fleet deployment readiness.
| Technical Specification Parameter | Value & Fleet Alignment |
|---|---|
| Product Brand Designation | Diamond Antenna |
| Hardware Model Designation | M285H |
| Primary Component Classification | Field-Tunable Mobile Vehicular Whip Antenna |
| Antenna Wavelength Typology | 5/8λ (Five-Eights Wavelength) Configuration Matrix |
| Operational Frequency Spectrum Range | 134 MHz to 174 MHz (Professional VHF Mobile Band) |
| Tuning Optimization Mechanism | Included Factory Cutting Chart for precise length calibration |
| Antenna Radiation Gain Metric | 3.4 dB Ground Plane Signal Gain Boost |
| Maximum Input RF Power | 250 Watts Maximum Rating Capacity |
| System Characteristic Impedance | 50 Ohms Nominal Optimization |
| Voltage Standing Wave Ratio (VSWR) | Less than 1.5:1 Optimized Tuning Minimum |
| Primary RF Interface Base Connection | UHF-Male (M-P / PL-259 Thread Plug Assembly) |
| Total Physical Height Dimension | 1.40 Meters Total Layout Profile |
| Net Component Mass Weight | 200 grams Heavy-Duty Construction |
