Compact Omnidirectional Circularly Polarized Antenna Array with High Directivity
We have developed a very compact, omnidirectional circularly-polarized (OCP) antenna with high directivity for use in wireless applications including Device-to-Device (D2D) communication, radio-frequency identification (RFID) and wireless power transfer.
The global market for antennas is forecast to grow to over $22 billion by 2021, driven by the growth of the Internet of Things (IoT) devices and the emergence of smart antennas. OCP performance is required for D2D communication as it avoids pointing complications and polarization mismatch problems. We have developed a new method to achieve OCP radiation with high directivity in a compact and lightweight antenna structure which is ideal for IoT applications.
We have created two antenna array designs, a four-stage and a six-stage system. The four-stage array achieves an operating bandwidth of 130 MHz covering 2.34 to 2.47 GHz with a maximum CP realized gain of 5.1 dBic. The six-stage array achieves an operating bandwidth of 110 MHz covering to 2.37 to 2.48 GHz with a maximum CP realized gain of 7.12 dBic. Both of our arrays are smaller than existing designs and possess superior physical and radiation performance characteristics. Our antenna designs can be fabricated by either mechanical or 3D-printing manufacturing processes.
- Omni-directional performance avoids acquisition and pointing complications
- Circularly-polarized performance avoids polarization mismatch problems that arise from linearly polarized systems
- High directivity, i.e. antenna gain
- Compact size
- Low cost to manufacture
- Device-to-Device (D2D) communication
- Wireless power transfer
Status and IP Position
A patent application for this technology has been filed and UTS is seeking a partner to license this technology or to work with the researchers to develop it further.