| RF parameters | unit | numerical value | Remark |
| WiFi protocol | - | IEEE 802.11b/g/n/ac | - |
| reference distance | M | 200 | Antenna gain 5dBi, module and device communication |
| Communication interface | - | USB 2.0 | - |
| Working frequency band | GHz | 2.4～2.484&5.15~5.85 | Supports global license-free ISM 2.4GHz frequency band |
| working temperature | ℃ | -20~70 | - |
| Working humidity | RH | 10%~95% | No condensation |
| Hardware parameters | Parameter details | Remark |
| chip | RTL8811CU-CU-CG | - |
| Packaging method | patch | - |
| Antenna interface | stamp hole | Characteristic impedance is about 50 ohms |
| Communication interface | USB 2.0 | - |
| size | 12*12*1.7mm | The error size is ±0.2mm |
| weight | 0.47g | The error is ±0.1g |
Practical Application Scenarios
1. Embedded Multimedia Streaming Devices
The E103-RTL8811CU's dual-band capability and high throughput (433Mbps) make it an excellent choice for wireless projectors, smart TVs, and streaming set-top boxes. By integrating this module via USB 2.0, device manufacturers can offer high-definition content streaming without the congestion typical of 2.4GHz-only devices, ensuring a smoother user experience in interference-heavy home environments.
2. Industrial IoT Gateway Data Uplink
In smart factory monitoring, this module provides a high-speed local wireless link for gateways that aggregate data from distributed sensors. When used alongside our industrial serial servers, the E103-RTL8811CU acts as a reliable high-bandwidth bridge to the local WiFi infrastructure, allowing large volumes of diagnostic data to be transmitted to the cloud for real-time analytics and predictive maintenance.
3. Compact Smart Appliance Connectivity
Measuring only 12x12mm, this module is perfectly suited for space-constrained smart home appliances, such as smart refrigerators or automated coffee machines. Its ease of USB integration reduces PCB layout complexity for OEM designers, enabling manufacturers to add high-performance WiFi connectivity to compact form-factor products without requiring large internal antennas or extensive custom RF shielding.
FAQ Section
1. Why choose the RTL8811CU dual-band solution over single-band 2.4GHz modules?
Dual-band support is critical for modern wireless environments. While 2.4GHz is often crowded with interference from Bluetooth and other WiFi devices, the 5.8GHz band offers significantly more non-overlapping channels and higher throughput capacity. This module allows your device to automatically switch to the cleanest available channel, ensuring consistent connectivity in both home and dense industrial settings.
2. Is this module compatible with Linux and Windows-based embedded systems?
The Realtek RTL8811CU-CU-CG chipset is highly versatile and widely supported in the Linux and Windows development ecosystems. It provides a standard USB interface, making it "plug-and-play" with most kernel-level drivers. This drastically reduces the development time for engineers creating customized wireless peripheral devices or industrial control terminals.
3. Can the 200m communication range be extended in an industrial environment?
The 200m range is an open-field benchmark. In actual deployments, distance can vary based on obstacles and RF shielding. To optimize performance, we recommend using high-quality external antennas and placing the module clear of metal enclosures. For applications requiring wider coverage, this module can be paired with our wireless mesh or repeater solutions to ensure seamless connectivity throughout your facility.
