2-DIMENSIONAL QUASI-OPTICAL POWER-COMBINING ARRAYS USING STRONGLY COUPLED OSCILLATORS

Two-dimensional quasi-optical power-combining arrays are designed by u sing strongly coupled oscillators. The oscillators are connected by a microstrip coupling line for strong coupling. Two types of connections are discussed. One is the line-structure and the other is the loop-st ructure. The oscillation modes of the coupled oscillators for these tw o types of configurations are analyzed and compared. The experimental results for circuits with different configurations are compared to the theoretical results. The application of these two types of connection s in the two-dimensional array is discussed. A multilayer (3-D) struct ure is employed in the circuit design to accommodate the complex layou t of the two-dimensional arrays. A 4 x 4 power-combining array in mult ilayer structure is demonstrated.