Patent attributes
A method for a vertical transition between a coaxial structure and a microstrip line features a slot in the ground plane of the microstrip line and near one end of its signal line. Multiple through holes are created at the substrate within the slot. The multiple through holes include a transition hole next to the end of the signal line, and at least a second hole. The transition hole and the slot are managed to establish a first eccentric configuration to achieve field transformation between the coaxial structure and the microstrip line, which would reduce the insertion loss of the vertical transition at higher frequencies and increase its 1-dB passband. The second hole and the slot are arranged to create a second eccentric configuration, and the second hole is used to relocate a resonance response caused by the slot towards higher frequencies to further increase the 1-dB passband.
