To support the ever-increasing demand on connectivity and datarates, multiple beam
antennas are identified as a critical technology for the fifth generation (5G), the sixth …

Beamforming networks for multiple beam antennas are believed to be in the vanguard of
technological developments in mmWave for 5G wireless applications. The basic idea of …

A 5× 8 Butler matrix (BM) operating in the millimeter-wave band is presented in this letter.
The matrix is extended from two 3× 4 Butler matrices by adding two couplers and one power …

In this article, a novel design approach for designing 4× 4 and 8× 8 filtering Butler matrices is
proposed. The matrices, composed of combined 90° couplers and 180° filtering couplers as …

This paper introduces a novel family of one-dimensional switching matrices, also known as
beamforming networks (BFNs), which can be sized for an arbitrary number of beams. It also …

Existing millimeter-wave beamforming network-based multibeam antennas usually suffer
from complex configuration and bulky size, which limit their applications on a vehicle. To …

This article presents the design of a Ka-band beam-switchable and beam-steerable endfire
planar Yagi–Uda antenna array fed by a wideband Butler matrix, combining continuously …

The miniaturization design of the beamforming network (BFN) is the key to improving the
application value of the multibeam array antenna. The traditional miniaturization method of …

In this article, a reconfigurable filtering beamforming network (FBFN), which is capable of
generating reconfigurable progressive phase difference and amplitude distribution, is …

This article presents our study on a wideband miniaturized Butler matrix (BM) beamforming
network based on a stacked metallic waveguide layout in millimeter-wave band. The size …