Patent ID: 7554418
Filing Date: 2009-06-30
Classification: H01P

Abstract:
1. A waveguide/strip line converter comprising: a waveguide; and a multilayer substrate that has a first end and a second end, which are opposed to each other, wherein the second end of the multilayer substrate is fixed to an opening of the waveguide, and the multilayer substrate includes a plurality of dielectric layers that are stacked one after another between the first end and the second end of the multilayer substrate in a stacking direction to provide a plurality of substrate faces, which include: a waveguide passage extends through the opening of the second short-circuiting metal pattern and the opening of the third short-circuiting metal pattern in the stacking direction between the strip line and the matching element in the multilayer substrate; the first short-circuiting metal pattern, the second short-circuiting metal pattern, the third short-circuiting metal pattern, the fourth short-circuiting metal pattern and the waveguide are grounded together; a cross sectional area of the opening of the third short-circuiting metal pattern is larger than a cross sectional area of the opening of the second short-circuiting metal pattern; and the cross sectional area of the opening of the third short-circuiting metal pattern is larger than a cross sectional area of the opening of the fourth short-circuiting metal pattern.