This 5dBi circularly polarized ceramic antenna is designed for RFID and wireless applications operating at 915MHz and 866.5MHz. With a compact 40 × 40 × 5mm ceramic antenna element and a 50 × 50mm overall antenna size, it offers a practical solution for devices where reliable RF performance and space efficiency are both important.
The antenna provides a gain of 5dBi ±1 and uses circular polarization to help maintain consistent RF performance when the orientation of a tag or device varies. With a 50Ω impedance and an axial ratio of ≤5dB, it can be integrated into a variety of RFID readers and wireless equipment.
Available with different terminal configurations and SMA connectors, this ceramic antenna can be adapted to different installation and connection requirements.
Technical Specifications：
| Antenna Type |
Circularly Polarized Ceramic Antenna |
| Frequency |
915MHz / 866.5MHz |
| Ceramic Antenna Size |
40 × 40 × 5mm |
| Overall Antenna Size |
50 × 50mm |
| Gain |
5dBi ±1 |
| Polarization |
Circular Polarization |
| Axial Ratio |
≤5dB |
| Impedance |
50Ω |
| Antenna Material |
PCB + Ceramic |
| Connector |
Various terminals and SMA connectors |
| Operating Temperature |
-25°C to 75°C |
Applications
The compact size and circular polarization of this ceramic antenna make it suitable for a range of RFID and wireless applications, including:
RFID readers
RFID inventory management systems
Asset tracking equipment
Warehouse and logistics systems
Industrial identification equipment
Access control systems
Wireless identification devices
Compact RF equipment
Other 866.5MHz and 915MHz wireless applications
Compact Ceramic Antenna Design
The antenna combines a ceramic antenna element with a PCB structure to provide a compact form factor for equipment with limited installation space. The ceramic element measures only 40 × 40 × 5mm, while the overall antenna measures 50 × 50mm.
This compact design makes it easier to integrate the antenna into RFID readers, wireless terminals, and other RF devices without requiring a large installation area.
Circular Polarization for Flexible RFID Reading
Circular polarization can be useful in RFID applications where tags may not remain in a fixed orientation. Compared with a fixed linear polarization approach, circular polarization can provide greater flexibility when the relative orientation between the reader antenna and tag changes.
The antenna features an axial ratio of ≤5dB and a gain of 5dBi ±1, providing a balance between RF performance and compact antenna design.
Flexible Connector Options
Different equipment designs may require different connection methods. This antenna can be supplied with various terminal configurations as well as SMA connectors, allowing it to be integrated into different RFID reader and wireless device designs.
Operating Temperature
The antenna is designed to operate from -25°C to 75°C, making it suitable for a variety of indoor and industrial environments where temperature conditions may vary.
Why Choose a 5dBi Circularly Polarized Ceramic Antenna?
For RFID and wireless equipment, antenna selection can affect reading performance, installation flexibility, and overall device design. This 5dBi ceramic antenna combines a compact structure, circular polarization, 50Ω impedance, and flexible connector options in a single antenna solution.
Its support for both 915MHz and 866.5MHz makes it suitable for wireless systems operating across commonly used UHF frequency ranges, subject to the specific regional requirements of the application.
