Patent ID: 8123536

Claim:
An electrical connector which includes a frame ( 12 ) with conductive walls that are connected to a first ground (G 1 ), said frame having front and rear ends and having a plurality of cavities ( 14 , 20 , 22 ) that each extends longitudinally (M) between said ends, a first dielectric holder ( 24 ) that fits closely in a first ( 14 ) of said cavities, said holder having a plurality of first longitudinally-extending passages ( 30 ), a plurality of first contacts ( 32 ) that each lies in one of said first passages, a second dielectric holder ( 26 , 28 ) that fits closely in a second one of said cavities ( 20 , 22 ) and that has a plurality of second longitudinally-extending passages ( 36 ), and a plurality of second contacts ( 34 ) that each lies in one of said second passages, wherein: each of said first contacts ( 32 ) is a signal contact that carries a different signal than the other of said plurality of first contacts, and each first contact has a first characteristic impedance; said second contacts include a second signal contact ( 52 , 54 ) with a second characteristic impedance that is at least 50% different from said first characteristic impedance, said second contacts also including a second ground contact ( 56 ) that is connected to a second ground (G 2 ) that is isolated from said first ground.