This article presents a novel, low-cost, beam-switchable 2 × 10 antenna array system operating at 60 GHz. This antenna system is constructed of two rows of Chebyshev-tapered microstrip antenna arrays. Each row is a 10 element seriesfed array which are fed by a 90 ∘ coupler. The designed antenna array has only two input ports, but it is capable of generating three switchable beams. This antenna system can spatially scan 90 ∘ with at least −5 dB normalised gain using only one SPDT switch and a

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... gle transceiver. The maximum gain realised by the system was measured as 16.4 dBi and the bandwidth (BW) was >1 GHz. The features of the proposed antenna system make it applicable to do mmWave research such as beamforming algorithms and channel sounding, and to use in handsets for 5G communication.