Excitation Phase Control of Parallel-Fed Waveguide Slot Array Antenna Using Printed Circuit Board Single-Layer Structure Transmit Array

In parallel-fed waveguide slot array antennas, it is difficult to control the excitation phase of each element due to the complexity of the structure. A dielectric resonator-based transmit array, which can be loaded on antennas and whose excitation phase can be controlled, has been developed and evaluated. However, it requires drilling or laser processing, and fabrication error and productivity are issues. Transmit arrays based on printed circuit board (PCB) processing technology have been proposed, but they are narrow bandwidth and multilayer structures. In this paper, we present a transmit array using a single layer of PCB, and report on its design and measurement results.