High speed electrical connector with improved EMI suppression and mechanical retention shield
View Patent ↗The embodiments of the present invention provide a shielded connector having improved shielding effectiveness to reduce electromagnetic interference (EMI). Some of the various embodiments provide high-speed electrical connectors capable of carrying gigabyte data rate signals. The shielding may employ, among other things, one or more shielding structures to reduce the EMI associated with these and other signals. The shielding structures may be oriented to reduce or limit the apertures within the connector through which EMI can penetrate. For example, some embodiments for a universal serial bus (USB) connector may support both a USB 3.0 and USB 2.0. For these embodiments, a grounding tab or peg may be placed in the rear of the connector between the USB 3.0 and the USB 2.0 connections to divide the aperture for the port into a plurality of sections. The grounding tab or peg may also serve as a structural support for the connector.
1. A female USB connector, comprising:
an insulative housing defining first and second female USB receptacles;
an electrically conductive shell enclosing the insulative housing and defining a front receiving cavity providing access to the first and second USB receptacles and first and second apertures on a rear side of the electrically conductive shell;
a first set of contacts held in the insulative housing for transmitting signals at a first data rate, wherein the first set of contacts have respective portions exposed in the front receiving cavity and extending rearward through the first aperture; and
a second set of contacts held in the insulative housing for transmitting signals at a second data rate that is higher than the first data rate, wherein the second set of contacts have respective portions exposed in the front receiving cavity and extending rearward through the second aperture;
wherein:
the first and second apertures are separated by a grounding structure that extends from the electrically conductive shell below the first and second sets of contacts for attachment to a printed circuit board (PCB) through a through-hole of the PCB; and
the first and second apertures have a total width of approximately 13-15 mm.
2. The female USB connector of claim 1 , wherein the electrically conductive shell comprises an external, upper EMI shield.
3. The female USB connector of claim 1 , wherein the electrically conductive shell comprises an internal, lower EMI shield.
4. The female USB connector of claim 1 , wherein the first set of contacts transmit USB 2.0 signals.
5. The female USB connector of claim 1 , wherein the second set of contacts transmit USB 3.0 signals.
6. The female USB connector of claim 5 , wherein the second aperture is approximately 4-5 mm wide.
7. The female USB connector of claim 5 , wherein the first aperture is approximately 8-9 mm wide.
8. The female USB connector of claim 1 , wherein the grounding structure is an extension of the electrically conductive shell.
9. The female USB connector of claim 8 , wherein the grounding structure is a solid, peg shaped structure.
10. The female USB connector of claim 8 , wherein the grounding structure is shaped to attach to the through-hole.
11. A universal serial bus (USB) connector comprising:
a housing configured to accept a plurality of male USB connectors and connect the plurality of USB connectors to respective sets of electrical connections, wherein at least one of the sets of electrical connections is configured to carry signals at a higher data rate than another of the sets of electrical connections; and
a shielding shell, coupled to the housing, comprising a set of structures for mounting the shell to a printed circuit board (PCB) and defining a plurality of apertures through which the sets of electrical connections for the USB connectors may pass, wherein the shielding shell includes at least one grounding structure separating the plurality of apertures and extending below the sets of electrical connections for attachment to the PCB through a through-hole of the PCB and configured to reduce electromagnetic interference (EMI) generated from signals for the higher data rate carried over the at least one of the set of electrical connections;
wherein at least one of the apertures is approximately 4 to 5 mm wide.
12. The USB connector of claim 11 , wherein the housing is electrically insulative.
13. The USB connector of claim 11 , wherein the shielding shell comprises an external EMI shield configured to cooperate with the housing to define a receiving opening for the at least one male USB connector.
14. The USB connector of claim 11 , wherein the shielding shell comprises an internal EMI shield.
15. The USB connector of claim 11 , wherein the housing is configured to accept at least one male USB 3.0 connector.
16. The USB connector of claim 11 , wherein the grounding structure provides a physical barrier between the plurality of apertures.
17. The USB connector of claim 11 , further including two or more grounding structures.
18. The USB connector of claim 11 , wherein the shielding shell is structurally configured to provide a shielding effectiveness of at least 8 dB.
19. The USB connector of claim 11 , wherein the shielding shell is structurally configured to provide a shielding effectiveness of electromagnetic interference having a frequency of about 3 to 5 GHz.