GRA-MAT50 Portable HF Ground Enhancement Mat

GRA-MAT50 is a compact magnetic ground enhancement mat designed for HF antennas from 7 to 50MHz.
It improves current return path, reduces SWR, and stabilizes antenna performance in portable and mobile environments.

📡 Turn Any Surface into an Effective Ground

HF antennas require a proper ground to operate efficiently.
In portable or mobile setups, achieving a stable ground is often the biggest challenge.
 
GRA-MAT50 helps bridge that gap by enhancing the electrical coupling between your antenna system and nearby conductive surfaces.
 

⚙️ Improve Current Flow, Not Just SWR

Instead of relying on unstable return paths through coax cables or equipment, GRA-MAT50 provides a controlled path for RF current.
This results in:
 
  • Lower SWR
  • More stable tuning
  • Improved radiation efficiency
  • Reduced common mode interference
 

📶 Optimized for Real HF Operation

  • Usable frequency range: 7 to 50MHz
  • Using 2 units extends usability down to 3.5MHz
 
Lower frequencies require larger effective ground areas.
Adding a second MAT50 increases coupling efficiency and improves performance in lower bands.
 

🚗 Built for Portable and Mobile Use

  • Magnetic attachment to metal surfaces
  • Ideal for vehicles, temporary setups, and field operations
  • Designed for POTA and emergency communication scenarios
 

🔥 Reliable Under Real Conditions

 
  • Power handling:
    • 500W SSB
    • 200W FM and CW
  • Heat resistance: -20°C to 90°C
  • Stable adhesion up to 110 km per hour (no wind condition)

🧩 Key Features

 
  • Enhances effective ground plane
  • Improves antenna efficiency without complex radial systems
  • Compact, lightweight, and easy to deploy
  • Made in Taiwan with high-quality materials
 
 

📐 Specifications

  • Usable frequency range: 7 to 50MHz
  • Extended frequency: down to 3.5MHz with 2 units
  • Power handling: 500W SSB, 200W FM and CW
  • Heat resistance: -20°C to 90°C
  • Adhesion: up to 110 km per hour (no wind)
  • Dimensions: 80 x 195 mm (sheet body)
  • Wire length: approx. 30 cm
  • Weight: approx. 55 g (including wire and terminal)
  • Material: adhesive resin magnet with copper sheet
  • Origin: Made in Taiwan

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