RAKARJ21 915MHz Whip Antenna Datasheet
Overview
Figure 1: RAKARJ21 Antenna OverviewDescription
The RAKARJ21 915 MHz Whip Antenna is a compact omnidirectional antenna for sub-GHz mesh networking. It is optimized for Meshtastic and similar low-power applications in the US915 ISM band.
Its vertical polarization and stable impedance matching improve link reliability. The lightweight whip design suits portable nodes, handheld devices, and fixed gateways. It supports reliable long-range communication and consistent radiation performance.
This Whip Antenna is also suitable for LoRa and LoRaWAN IoT applications. It can be reused across mesh and star network topologies.
Features
- Frequency Range: 902~928 MHz
- Peak Gain: 2 dBi
- VSWR: ≤1.5
- Omnidirectional radiation (360º horizontal beamwidth)
- Vertical polarization
- Lightweight 200 mm whip design
- SMA connector interface
- Feed impedance: 50 Ω
- Maximum input power: 10 W
Specifications
| Parameters | RAKARJ21 |
|---|---|
| Frequency Range | 902~928 MHz |
| Peak Gain | 2 dBi |
| Horizontal Beamwidth | 360º |
| Vertical Beamwidth | 45±3º |
| VSWR | ≤1.5 |
| Polarization | Vertical |
| Feed Impedance | 50 Ω |
| Maximum Input Power | 10 W |
| Connector Type | SMA |
| Dimensions (mm) | 200 mm |
| Operation Temp (°C) | -40~65º C |
| Humidity | 10%~95% RH non-condensing |
| Weight | 25 g |
| Base Material | Rubber |
| Use Environment | Indoor / Outdoor |
| Rated Wind Velocity | 36.9 m/s |
