Pro Ground Plane antenna 670Mhz

1/4 λ Ground Plane Antenna for 670 MHz – Tactical Foldable Design with Integrated Balun and Field Mast

When operational success depends on reliable communications, simplicity becomes the ultimate sophistication. This precision-engineered ground plane antenna delivers consistent performance without compromise—engineered for professionals who demand field-proven solutions without unnecessary complexity.

Optimized RF Performance

The quarter-wavelength ground plane design achieves textbook-perfect 50 Ω impedance without requiring external matching networks. The integrated balun actively suppresses common-mode currents, eliminating pattern distortion from feedline interference—critical when operating near vehicles, structures, or other antennas.

• Frequency-Tuned Radiation Pattern: Omnidirectional coverage with 2.2 dBi gain prioritizes low-angle radiation for terrestrial and low-altitude UAV links

• Lossless Construction

• Interference-Resistant: The folded radial system maintains consistent ground plane integrity even when deployed on conductive surfaces

Mission-Critical Applications

Unmanned Systems & Aerial Platforms

• Beyond-line-of-sight telemetry for payload delivery drones

• Redundant control links for swarm operations

• High-reliability data transmission for SAR UAVs (ADS-B, FLIR, LIDAR payloads)

Tactical Communications

• Rapid-deployment field radios for dismounted operations

• SDR-compatible antenna for software-defined systems

• Emergency coms backup for TACNET infrastructure

Field Engineering & Testing

• Portable reference antenna for spectrum monitoring

• Coverage mapping in urban canyons and rough terrain

Engineered for Harsh Environments

Modular Field Mast System
The 80 cm mast features a lock deployment mechanism—erects in <15 seconds without tools. 

Durable Radial Array
Eight PVC-coated steel radials provide 360° ground plane coverage while folding compactly. The spring-tempered design survives repeated deployment cycles without fatigue.

Battle-Ready Connectivity
Military-grade N-connector interfaces with 1 m Aircell-7 type(RF7) coaxial cable (0.7 dB/m loss at 670 MHz). The strain-relief boot prevents cable damage during transport.

Key Features:

• ✅ VSWR < 1.1 at 670 MHz, perfectly tuned each antenna.
  

• ✅ VSWR ≤ 1.5 bandwidth: approx. 70 MHz (from ~635 to 705 MHz) Equivalent to a Return Loss better than 14 dB

• ✅ Approx. 2.2 dBi gain, optimized for low-angle radiation

• ✅ balun – suppresses feedline interference and stabilizes pattern

• ✅ 8× flexible galvanized steel radial wires – full-size ground plane, non-removable but foldable, 

• ✅ Integrated 80 cm field mast – elevates antenna above obstacles

• ✅ N-connector + 1 m RF7 coaxial – low-loss, high-durability connection

• ✅ Modular, portable construction – quick setup and teardown

• ✅ Lightweight (~240 g) – ultra-mobile and easy to pack

• ✅ Power handling: up to 20 W continuous
  
  

Environmental Ratings

• Operating Temp: -30°C to +70°C

• Waterproof: when connectors are sealed

• Shock/Vibe resistant

Deployment Metrics

• Packed Length: ~50 cm

• Total Weight: 240 g (including cable and N connector)

• Setup Time: <30 seconds (single operator)

Radial Construction & Materials:

• The radiating element and radials are made from multicore galvanized steel wire with a PVC outer coating.

• This material is springy and shape-retaining, meaning it can be bent or folded for transport, but snaps back to the correct geometry when deployed.

• The "memory effect" ensures consistent antenna performance after repeated setup and takedown cycles.

• Radials are pre-installed and non-removable, but can be compressed for compact transport without damage or performance loss.

Included Components

• Pre-tuned GP antenna with integrated balun

• Quick-deploy folding mast (80 cm)

• 1 m Aircell-7 type coaxial cable (RF7) (N female to pigtail)

When Failure Isn't an Option
This isn't another amateur antenna—it's a field-validated solution refined through operational deployments. The passive design ensures decades of maintenance-free service, while the modular architecture adapts to vehicles, masts, or airborne platforms.

Deploy within 60 seconds. 

Precision-Tuned and Individually Tested

Every antenna is individually tuned for optimal performance at the specified frequency using a precision vector network analyzer (VNA).
We ensure a VSWR below 1.1, clean impedance match. Final QC includes small label with VSWR of each antenna.
On special requests we can include VSWR or RL graph for each antenna (paid service).

Frequency Customization:

Other versions are available on request for:

• Standard bands: 433, 868, 900, and 915 MHz

• Custom tuning available for: 415, 446, 650, 670, 770 MHz and others

All antennas are individually tuned and tested for optimal match at the requested frequency.