Studying a Method for Applying Phase Shift Using a Three-Channel Phase Shifter at a Central Frequency of 10 GHz: Design, Simulation and Construction

Feeding phased array antennas are crucial components of this type of antenna system. To change the angle of the beam in phased array antennas, the antenna arrays need to have a phase difference. A method for applying phase shifts in the power divider is presented, which can be integrated into a single antenna feed system structure. Using Substrate Integrated Waveguide (SIW) technology, which has been widely used in the manufacturing of microwave devices recently, makes it possible to design and manufacture all elements such as antennas, power dividers, filters, and phase shifters on a single substrate. This approach reduces manufacturing costs, size, and weight of microwave circuits; more importantly, it eliminates the losses associated with non-coplanar connections and circuits. A three-port phase shifter is proposed, illustrating how to control the phase difference between output ports. After designing, simulating, and optimizing the relevant parameters at a frequency of 10 GHz, the phase shifter was manufactured and measured on the Rogers RO4003 substrate. The measurement results matched well with the simulation results, and all findings are presented.