Patent ID: 8514036
Filing Date: 2013-08-20
Classification: H01P

Abstract:
1. An apparatus for controlling parallel-plate waveguide (PPW) modes, comprising: a first and a second conductive surface sized and dimensioned to form a parallel plate waveguide (PPW); a plurality of dielectric layers disposed in the PPW; and an array of conductive structures having a non-uniform cross sectional shape is formed in at least one of the plurality of dielectric layers, wherein the conductive structures have a non-uniform cross sectional shape comprised of a first via having a first cross sectional shape connected to a second via having a second uniform cross sectional shape; the first via has an aspect ratio of less than one and a first length; and, the second via has an aspect ratio of greater than one and a second length, the first and the second lengths dimensioned such that the length of the first via is at least 15 percent of a total length of the first and the second vias.