Transition structures for ultrahigh speed digital signal transmission, and digital transmission line including same

A transition structure for digital signal transmission, converting a differential line comprising two lines having opposite polarities into a balanced line while preserving a form of a differential signal, the transition structure including the differential line and the balanced line comprising:

• a dielectric substrate with a predetermined height;
• a first upper conductor and a second upper conductor disposed on top of the dielectric substrate and having the opposite polarities;
• a lower conductor connected to the second upper conductor on the bottom of the dielectric substrate and placed in parallel to the first upper conductor in a vertical direction;
• and
• a lower ground on the bottom of the dielectric substrate, wherein
• the differential signal is transmitted while maintaining a phase difference between a positive polarity and a negative polarity in a vicinity of 180°.

A transition structure for digital signal transmission, comprising a first dielectric substrate and a second dielectric substrate, and converting a differential line comprising two lines having opposite polarities into a balanced line while preserving a form of a differential signal, the transition structure including the differential line and the balanced line comprising:

• a first upper conductor and a second upper conductor disposed on top of the first dielectric substrate and having the opposite polarities;
• a first intermediate conductor and a second intermediate conductor are connected between the first upper conductor and the first dielectric substrate and between the second upper conductor and the second dielectric substrate, respectively, through vias;
• an intermediate ground disposed between the first dielectric substrate and the second dielectric substrate;
• and
• a lower conductor disposed on the bottom of the second dielectric substrate, connected to the second intermediate conductor, and disposed in parallel to the first intermediate conductor in a vertical direction, wherein
• the differential signal is transmitted while maintaining a phase difference between a positive polarity and a negative polarity in a vicinity of 180°.