Patent ID: 8611436

Claim:
A wideband balun structure comprising: a first signal path for a positive going differential signal and a second signal path for a negative going differential signal; a ninety-degree hybrid coupled to the first signal path for receiving the positive going differential signal at a first port and coupled to the second signal path for receiving the negative going differential signal at a second port with a third port of the ninety-degree hybrid coupled to the first port and functioning as an output port and a fourth port of the ninety-degree hybrid coupled to the second port and coupled to signal ground via a termination resistor; and a signal cable coupled to the output port; wherein the first signal path has a first phase shaper and the second signal path has a second order phase shaper for compensating for the signal loss caused by the signal cable and providing a frequency band from DC to at least 15 GHz and a transient response having less than ten percent pre-shoot.