Rectangular coaxial line to microstrip line matching transition and antenna subarray including the same

摘要

A microwave circuit including a rectangular coaxial transmission line, a microstrip transmission line and a wideband transition section for transitioning between the rectangular coaxial and microstrip lines. The transition section includes a capacitive section which cancels inductive reactance caused by physical discontinuities at the transition junction. The transition section includes a conductive tab extending from the rectangular coaxial center conductor which is electrically connected to the microstrip conductor line. The capacitive section can take the form of a dielectric disk of greater dielectric constant than that of the rectangular coaxial dielectric section, or an area of increased cross- sectional dimension of the rectangular coaxial center conductor.