In this paper, a compact 4× 6 Butler matrix (BM) based on microstrip lines is designed and
applied to a linear antenna array. The proposed design creates four beams in four different …

A compact 38 GHz multibeam antenna array is presented for fifth-generation applications. A
beamforming network featuring a substrate integrated waveguide (SIW) multifolded 4× 8 …

This letter presents a 28 GHz two-dimensional (2-D) multibeam array antenna fed by a
planar 4× 4 cascaded Butler matrix (CBM). Utilizing the proposed concept of 3-D-to-planar …

The design procedure and measured results of a novel Butler matrix are presented in this
paper. This asymmetrical structure provides fairly flexible phase outputs; therefore, the array …

This letter presents a multibeam antenna array fed by a substrate integrated waveguide 8× 8
dual-layer Butler matrix within the band from 28 to 31 GHz. The dual-layer structure is …

A multibeam beam-forming network (BFN) for generating 2-D multibeam array antenna
(MAA) is proposed using single-layer substrate integrated waveguide (SIW) technology …

This paper presents a substrate integrated waveguide (SIW) multibeam slot array operating
at GHz for future 5G mobile terminal applications. The multibeam forming network is realized …

This paper presents a low-cost, compact, multibeam planar antenna system with a wide
beam coverage angle at 28 GHz for 5G applications. The proposed microstrip based design …

A sidelobe-reduced, four-beam array antenna fed by a modified 4× 4 Butler matrix (BM) is
proposed for 5G applications. Two attenuators are utilized in two external channels of the …

A novel broadband three-input four-output (3× 4) Butler matrix is proposed in this
communication. The proposed Butler matrix achieves equal power division and-90°, 0° …