Intermediate electrical connector and electrical connector assembled component

1. An intermediate electrical connector to be connected to a mating connecting member, comprising:

an intermediate connecting member; and

a blade disposed in the intermediate connecting member,

wherein said blade includes a first ground plate, a second ground plate, a base member, a signal terminal, and a ground terminal,

said signal terminal and said ground terminal are disposed on a common surface of the base member and between the first ground plate and the second ground plate,

said signal terminal includes a first upper contact portion, a first lower contact portion, and a first connecting portion connected to the first upper contact portion and the first lower contact portion,

said ground terminal includes a second upper contact portion, a second lower contact portion, and a second connecting portion connected to the second upper contact portion and the second lower contact portion,

said first ground plate is situated on one side of the blade over the first connecting portion and the second connecting portion,

said first ground plate is arranged to contact with the second connecting portion,

said second ground plate is situated on an opposite side of the blade over the first connecting portion, the second connecting portion, the first upper contact portion, the first lower contact portion, the second upper contact portion, and the second lower contact portion, and

said second ground plate is arranged to contact with the second connecting portion.

2. The intermediate electrical connector according to claim 1 , wherein said second ground plate includes a protruding portion over the first contact portion, and

said protruding portion is away from the first contact portion by a distance determined according to an impedance at the first contact portion.

3. The intermediate electrical connector according to claim 1 , wherein said ground terminal further include a through hole formed in the second connecting portion, and

said second ground plate includes a protruding portion for being accommodated in the through hole.

4. The intermediate electrical connector according to claim 1 , wherein said second connecting portion has a width greater than that of the second upper contact portion and the second lower contact portion.

5. The intermediate electrical connector according to claim 1 , wherein said second connecting portion has a width greater than that of the first connecting portion.

6. The intermediate electrical connector according to claim 1 , wherein said second ground plate has a length greater than that of the first ground plate.

7. An electrical connector assembled component, comprising:

the intermediate electrical connector according to claim 1 ; and

a first mating connector as the mating connecting member,

wherein said first mating connector includes a mating signal terminal, a mating ground terminal, a mating ground plate, and a housing for retaining the mating signal terminal, the mating ground terminal, and the mating ground plate,

said mating signal terminal includes a first mating contact portion and a first mating connecting portion connected to the first mating contact portion,

said mating ground terminal includes a second mating contact portion and a second mating connecting portion connected to the second mating contact portion,

said mating ground plate is situated on one side of the mating terminal over the first mating connecting portion and the second mating connecting portion, and

said mating ground plate is arranged to contact with the second mating connecting portion.

8. The electrical connector assembled component according to claim 7 , further comprising a second mating connector; and

a joining member for joining the first mating connector and the second mating connector,

wherein said joining member is connected to the mating ground plate.