Hybrid J-Pole antenna 2.5 dBi 1240 MHz
- Omnidirectional J-Pole for 1240 MHz, ~2.2 dBi gain
- VSWR below 1.15, hand-tuned, other frequencies on request
- 50 Ω impedance, vertical polarization
- SMA connector (female as standard), under 11 g
- 4 or 6 cm RG402 or 1 m RG316D cable, for a drone or a ground station
Shipping costs are not included in the price.
Shipping costs are not included in the price.
Select product variant
Individual variants may differ in price
Product code: 4789_20250607154132
Item description
1240 MHz Hybrid J-Pole Antenna
Compact. Durable. Precisely Tuned. Now in Three Cable Lengths.
The 1240 MHz Hybrid J-Pole Antenna delivers high-performance RF transmission in a compact, mechanically robust design. Combining the trusted efficiency of the J-Pole configuration with modern materials, it provides reliable omnidirectional coverage in the 1240–1260 MHz L-band range — essential for telemetry, FPV, drone communication, and mobile RF platforms.
What Makes This Antenna Special?
This is not just a classic J-Pole — it's a hybrid evolution, engineered with:
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FR4 PCB stub for precise impedance matching
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Steel wire radiator, PVC-coated for strength and flexibility
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Hand-tuned performance to achieve peak efficiency at 1240 MHz
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Omnidirectional radiation in the horizontal plane
The result? Excellent VSWR (<1.15), ~2.2 dBi gain, and minimal signal loss in real-world conditions.
Technical Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 1230 – 1260 MHz |
| Center Frequency | 1240 MHz (custom available) |
| VSWR | < 1.15 |
| Gain | ~2.2 dBi |
| Impedance | 50 Ω |
| Polarization | Vertical |
| Connector | SMA (female, standard) |
| Weight | < 11 g |
| Radiating Element | PVC-coated spring steel |
| Stub Material | FR4 laminate (gold-plated traces) |
Available Versions
Ultra-Short (4 cm RG402)
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For extremely tight integration
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Ideal for mini FPV drones, cube-shaped modules, or systems with minimal internal clearance
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Maintains rigid shape, resistant to vibration and deformation
Short (6 cm RG402)
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Perfect for medium-sized drones, compact ground units, or robotics
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Rugged and semi-rigid — great balance of size and durability
Long (1 m RG316D)
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Flexible cable for versatile mounting
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Suited to ground stations, mobile poles, or longer-range telemetry setups
Use Cases
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FPV drone systems (analog & digital 1.2 GHz video links)
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UAV telemetry and command/control systems
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Portable ground stations
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Industrial IoT and sensor backhaul
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L-band amateur radio experiments
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Emergency or tactical communication kits
