Independent, Simultaneous Operation of Phased Array Without Grating Lobes and Beam Squint from f1 to 2f1 Frequency Range

In this paper, an unprecedented phased array for millimeter-wave (mmWave) wireless communication, capable of independent and simultaneous beamsteering in the 24-30 GHz and 39-50 GHz frequency ranges without grating lobes or beam squint is presented. The design employs a newly devised compact, low-loss, high-selective coupler (CLSC) feed network. The 1 × 4 antenna array exhibits peak realized gain of 9 dBi at 24 GHz and 12 dBi at 48 GHz, along with a scanning angle of +/- 45 degrees for both frequencies. To the best of our knowledge, this study is the first to demonstrate phased arrays operating simultaneously without grating lobes in the f1 to 2f1 frequency range.