Multi-beam antennas are critical components in future terrestrial and non-terrestrial wireless
communications networks. The multiple beams produced by these antennas will enable …

Orthogonality in multibeam antennas is revisited. The difference between orthogonal
beamforming and zero-forced beamforming is highlighted. The intriguing relation between …

5G multiple-input, multiple-output (MIMO) antenna systems will be an important pillar in
realizing the new standard. The key advantages that MIMO provides are high data rate, low …

It is well established that the utilization of unused millimeter-wave (mmWave) spectrum is
inevitable due to unavailability of required bandwidth in the conventional RF band to support …

A novel hybrid beamforming architecture based on a phased array of active multiport
subarrays is proposed for multi-user 5G applications. The subarrays have multiple …

This communication proposes a millimeter-wave (mmWave) phased antenna array
configuration, with 2-D beam-switching functionality and scalability in terms of the array size …

Novel three-dimensional discrete lens antennas characterized by a number of focal points
ranging from one to five and defined explicitly via analytical equations are presented in the …

In this chapter, we first discussed the definitions that are vital to understand the working of a
beamformer. We then classified the beamformer based on the architecture, frequency of …

Data rate requirements for cellular communications are expected to increase 1000-fold by
2020, compared to 2010. This is mainly because of the rapid increase in the number of …

This work introduces a new class of low-cost, passive, planar, multibeam, true-time-delay
(TTD) millimeter-wave (mmWave) beamforming networks that scan in both azimuth and …