Feeding circuit of phased array composed of four slotted waveguides with only one phase shifter using block excitation technique

Phased array antennas are being applied for commercial use of highly functional antenna applications such as automotive radars and FWA (fixed wireless access) systems in recent years. Since phase shifters are connected to all the elements of phased arrays, high cost is a significant problem in commercial use. We propose a feeding circuit of a waveguide antenna to produce a beam scanning function by using only one phase shifter with four slotted waveguide linear array antennas.