Electrical connector with insertion loss control window in a contact module

1. An electrical connector comprising:

a contact module having a first dielectric frame holding first conductors and a second dielectric frame holding second conductors stacked with the first dielectric frame to form the contact module;

the first conductors extend between a mating end and a terminating end, the first conductors have a transition portion between the corresponding mating end and the terminating end passing through the first dielectric frame, the transition portions of the first conductors have opposite first and second sides and opposite first and second edges between the first and second sides;

the second conductors extend between a mating end and a terminating end, the second conductors have a transition portion between the corresponding mating end and the terminating end passing through the second dielectric frame, the transition portions of the second conductors have opposite first and second sides and opposite first and second edges between the first and second sides, wherein the first and second conductors are arranged in pairs;

the first dielectric frame having insertion loss control windows defining air pockets exposing exposed portions of the corresponding first conductors to air, the size and shape of the insertion loss control windows controlling insertion loss along the first conductors;

the second dielectric frame having insertion loss control windows defining air pockets exposing exposed portions of the corresponding second conductors to air, the size and shape of the insertion loss control windows controlling insertion loss along the second conductors, wherein the insertion loss control windows of the second dielectric frame are aligned with and open to the insertion loss control windows of the first dielectric frame.

2. The electrical connector of claim 1 , wherein the insertion loss control windows expose both the first and second conductors of the corresponding pair in the common air pocket.

3. The electrical connector of claim 1 , wherein the insertion loss control windows entirely surrounds the exposed portions of the first and second conductors such that the first and second sides and the first and second edges of both the first and second conductors within the pair are exposed in the common air pocket.

4. The electrical connector of claim 1 , wherein the insertion loss control windows in the first and second dielectric frames have identical sizes and shapes.

5. The electrical connector of claim 1 , further comprising shields coupled to the first and second dielectric frames to provide electrical shielding for the first and second conductors, the first and second shields covering the insertion loss control windows.

6. A contact module for an electrical connector comprising:

a first dielectric frame holding first conductors, the first conductors each extend between a mating end and a terminating end, the first conductors each have a transition portion between the corresponding mating end and the terminating end passing through the first dielectric frame, the transition portions of the first conductors have opposite first and second sides and opposite first and second edges between the first and second sides, the first dielectric frame having first insertion loss control windows defining air pockets exposing exposed portions of the corresponding first conductors to air, the size and shape of the first insertion loss control windows controlling insertion loss along the first conductors;

a second dielectric frame holding second conductors, the second dielectric frame being stacked with and coupled to the first dielectric frame to form the contact module, the second conductors each extend between a mating end and a terminating end, the second conductors each have a transition portion between the corresponding mating end and the terminating end passing through the second dielectric frame, the transition portions of the second conductors have opposite first and second sides and opposite first and second edges between the first and second sides, wherein the first and second conductors are arranged in pairs, the second dielectric frame having second insertion loss control windows defining air pockets exposing exposed portions of the corresponding second conductors to air, the size and shape of the second insertion loss control windows controlling insertion loss along the second conductors;

wherein the first and second insertion loss control windows are arranged in pairs being aligned with and open to each other to form common air pocket for the pairs of first and second conductors.

7. The contact module of claim 6 , wherein the first and second insertion loss control windows expose both the first and second conductors of the corresponding pair in the common air pocket.

8. The contact module of claim 6 , wherein the first and second insertion loss control windows entirely surrounds the exposed portions of the first and second conductors of the corresponding pair such that the first and second sides and the first and second edges of both the first and second conductors within the pair are exposed in the common air pocket.

9. The contact module of claim 6 , wherein the first dielectric frame includes an interior side and an exterior side, the first insertion loss control windows are open between the interior side and the exterior side, the second dielectric frame includes an interior side and an exterior side, the second insertion loss control windows are open between the interior side and the exterior side, the interior sides of the first and second dielectric frames face each other.

10. The contact module of claim 6 , wherein the aligned first and second insertion loss control windows have identical sizes and shapes.

11. The contact module of claim 6 , further comprising a first shield coupled to the first dielectric frame and a second shield coupled to the second dielectric frame to provide electrical shielding for the first and second conductors, the first and second shields covering the first and second insertion loss control windows.