Suppression of Ground Resonances in a Transmission-Line Based Connector

Two methods are proposed to suppress “ground resonances” in transmission-line based connectors with guard traces. These methods are based on phase difference compensation between the excited signal and ground differential modes in the coplanar section of the connector. The first method eliminates the initial phase difference introduced by the junction at the input port. The second method compensates the initial phase difference by slowing down the signal differential mode.