Low-impedance coaxial connection device with housing for a camera module
A connection device for a coaxial cable which allows a comprehensive shielding by continuing the outer conductor through the entire housing of the connection device and onwards through the entire camera module. The outer conductor of an interface for the connection of a coaxial cable is electrically coupled with an electrically conductive housing, wherein the housing allows an electrical shielding of the inner components of a camera module.
1. A connection device for connecting a coaxial cable to a camera module, comprising:
an electrically conductive connector housing defining an opening;
a connection element configured to connect an inner conductor of the coaxial cable to a first electrical connection of the connection element and an outer conductor of the coaxial cable to a second connection of the connection element, and wherein the connection element is disposed in the opening of the connector housing; and
a contact plate having a first connection region electrically connected to the first connection of the connection element and a second connection region electrically connected to the second connection of the connection element,
wherein the second connection of the connection element includes a further contact sleeve via which an entire circumference of the outer conductor of the coaxial cable may be connected,
wherein the further contact sleeve is electrically connected to the electrically conductive connector housing using an electrically conductive adhesive such that a low-impedance electrical connection between the connector housing and the further contact sleeve is attained, and
wherein the connector housing encloses a side facing the opening of the connector housing and side regions of the contact plate and wherein the connector housing and the second connection are comprehensively electrically connected to one another with a low impedance.
2. The connection device according to claim 1 , wherein the connector housing and the second connection of the connection element are connected to one another with an electrically conductive adhesive.
3. The connection device according to claim 1 , wherein the second connection of the connection element is comprehensively mechanically pressed into the connector housing.
4. The connection device according to claim 1 , wherein the connection element comprises a FAKRA connector.
5. The connection device according to claim 1 , wherein the connection element comprises a housing part which is adapted to the connection regions of the contact plate.
6. The connection device according to claim 1 , further comprising a sealing element disposed on the side of the connector housing facing the coaxial cable.
7. The connection device according to claim 1 , wherein the connector housing comprises at least one of a metal material and an electrically conductively coated plastic.
8. A camera module, comprising:
an image acquisition device having an optical module and a printed circuit board, wherein the optical module is arranged on a front side of the printed circuit board;
an electrically conductive camera housing, in which the image acquisition device is disposed; and
a connection device comprising
an electrically conductive connector housing defining an opening,
a connection element configured to connect an inner conductor of a coaxial cable to a first electrical connection of the connection element and an outer conductor of the coaxial cable to a second connection of the connection element, and wherein the connection element is disposed in the opening of the connector housing, and
a contact plate having a first connection region electrically connected to the first connection of the connection element and a second connection region electrically connected to the second connection of the connection element,
wherein the second connection of the connection element includes a further contact sleeve via which an entire circumference of the outer conductor of the coaxial cable may be connected,
wherein the further contact sleeve is electrically connected to the electrically conductive connector housing using an electrically conductive adhesive such that a low-impedance electrical connection between the connector housing and the further contact sleeve is attained, and
wherein the connector housing encloses a side facing the opening of the connector housing and side regions of the contact plate and wherein the connector housing and the second connection are comprehensively electrically connected to one another with a low impedance,
wherein the first connection region and the second connection region of the contact plate are each electrically coupled with an electrical connection on the printed circuit board of the image acquisition device.
9. The camera module according to claim 8 , wherein the camera housing and the connector housing are electrically connected to one another.
10. The camera module according to claim 8 , wherein the camera housing and the connector housing are welded to one another.
11. A camera module according to claim 8 , further comprising a spring element electrically coupling the printed circuit board of the image acquisition device with the contact plate.