Printed Multilayer Dipole Array
Image of the Printed Multilayer Dipole Array.

5G (Fifth Generation Wireless Communication) aims to address the increasing demand for high-bandwidth, high-data-rate communication as well as the emergence of machine-to-machine communications (M2M) as part of the continuous evolution in mobile communication. MIMO (multiple-input multiple output) technology has improved the bandwidth efficiency for wireless communications systems and will form a vital part in 5G systems for further enhancement.

The printed dipole array consists of a linear array of dipoles that - depending on the element spacing - can be steered between -60° and 60°. When designed to operate at 5G mmWave bands, the array is small enough that it is feasible for multiple arrays to be integrated in a device the size of a typical mobile phone. By independently steering the beams of these multiple arrays, highly flexible and optimal MIMO operation can be achieved for different operating environments.

Typical total gain pattern at the centre frequency with a squint angle of 0°, 10°, 30°, 40° and 50° for an 8-element array
Typical active S-parameters versus frequency for an 8-element array with a 30° squint angle