Figure 1: Front and back images of the 5dBi Circularly Polarized Antenna (128)
The 5dBi Circularly Polarized Antenna (128) is a general-purpose far-field antenna suitable for UHF band RFID applications. It features a compact size, high gain, low VSWR, good symmetry of the radiation pattern, and low axial ratio. It can be conveniently used in UHF RFID applications such as access control, warehousing, logistics, and retail.
| Product Model | RHA-9W128R |
| Frequency Range (MHz) | 902MHz～928MHz |
| Polarization Mode | Circular polarization |
| Gain (dBi) | ＞5dBi |
| Axial Ratio (dB) | ＜3dB |
| H-plane HPBW | 86 degrees |
| E-plane HPBW | 86 degrees |
| Impedance (Ω) | 50Ω |
| Voltage Standing Wave Ratio (VSWR) | ≤1.3:1 |
| Connector Type | SMA-KF external thread female connector |
| Connector Position | Rear feed or side feed |
| Product Dimensions (mm) | 128mm×128mm×20mm |
| Weight | 235g (excluding bracket) |
| Material | Engineering plastic ABS + aluminum |
| Color | Off-white |
| Protection Level | IP65 |
| Mounting Method | Pole mount (max pole diameter 50mm) or wall mount |
| Operating Temperature (°C) | -40°C ～＋85°C |
Table 1: Product parameter definitions for the 6dBi Circularly Polarized Antenna (128)
Gain vs. Frequency Curve
Figure 2: Gain vs. Frequency Curve
Axial Ratio vs. Frequency Curve
Figure 3: Axial Ratio vs. Frequency Curve
H-plane 2D Radiation Pattern (Horizontal Beam Pattern)
Figure 4: H-plane 2D Radiation Pattern
Figure 5: E-plane 2D Radiation Pattern
Return Loss S11 vs. Frequency Curve
Figure 6: Return Loss S11 vs. Frequency Curve
Voltage Standing Wave Ratio (VSWR) vs. Frequency Curve
Figure 7: VSWR vs. Frequency Curve
Figure 8: Dimensions of the 128 Antenna, including length, width, thickness, back rivet positions, and SMA connector position
Figure 9: Dimensions of the 128 Antenna ear spacing and hole diameter
