R3SGB-490-4-NMO
High-Gain 450-512 MHz Low-Profile NMO "Shot Glass" Antenna
- The RFMAX R3SGB-490 is a high-gain, low-profile UHF antenna engineered for 450-512 MHz public safety and LMR radio systems
- Featuring rugged IP67 construction, NMO mounting, and superior RF performance, it delivers reliable, mission-critical communication for police, fire, EMS, and demanding fleet applications.
- With up to 4.6 dBi peak gain, a 360° omnidirectional radiation pattern, and DC-grounded ESD protection, this antenna ensures optimal coverage, reduced noise, and long-term field durability
- Its compact 3.5-inch form factor and wideband support make it ideal for modern radio deployments requiring maximum performance in a minimal footprint
Technical Specifications
| SKU | R3SGB-490-4-NMO |
|---|---|
| Manufacturer | RFMAX |
| Color | Black |
| Connector 1 | NMO Mount |
| Directional or Omni | Omni Directional |
| Working Frequency | 450-512 MHz |
| Antenna Category | UHF (380-600 MHz) |
| Gain | 4.6 dBi |
| Ground Plane Required | Yes |
| Height/Length (inches) | 3.54 |
| Height/Length (mm) | 89.9 |
| OK for Outdoor Use | Outdoor |
|---|---|
| IP Rating | IP67 |
| Max Input Power (W) | 100W |
| Operating Temp (celsius) | -40°C to +85°C |
| Polarity | Vertical |
| Thickness/Diameter (inches) | 1.75 |
| Thickness/Diameter (mm) | 44.2 |
| VSWR: < X: 1 | <2.0:1 |
| Weight (grams) | 105 |
| Weight (lbs) | 0.23 |
