Patent Application
20080242120
The present disclosure is related to a connector for coaxial lines between circuit boards disposed at right angles. More specifically, the present disclosure is related to IEEE802.3ap ad-hoc modeling technology, Advanced Tele-Communication Architecture (ATCA), and high-speed platform connectors, in high-speed platforms.
In modern communication systems, where data rates are approaching dozens of gigabits per second, the interface connector becomes critical to the overall interface performance. The electrical field distortion and radiation loss of existing interface connectors often dramatically degrade channel performance, especially in high speed platforms. In some cases, the entire interface cannot meet required specifications even after applying advanced signaling techniques such as de-emphasis in the transmitter buffer and equalization in the receiver buffer. There exists a call for a coaxial connector configured for implementation in high-speed existing platforms which does not have or create such drawbacks and inefficiencies.
A connector for coaxial lines between circuit boards disposed at right angles should become apparent from a reading of the ensuing description together with the drawings, in which:
Although the following Detailed Description will proceed with reference being made to these illustrative embodiments, many alternatives, modifications, and variations thereof will be apparent to those skilled in the art. Accordingly, it is intended that the claimed subject matter be viewed broadly.
The right-angle coaxial connectors of
For short backplane interfaces, connector 100 achieves a cost-effective solution to the inefficiencies and drawbacks of existing connectors by eliminating the need for a complex equalization scheme. For long backplane interfaces, connector 100 may be used together with simple equalization methods to improve the signaling performance at a lower cost than would otherwise be achieved.
A second embodiment of the proposed co-axial connector and base structure is shown in more detail in
Pins 130 of connector base 120 are inserted through holes 210 of mother board 202 and soldered by a known method to make connections at the associated layers 220 of the board. Pins 116 of connector 160 are inserted through holes 212 of daughter board 204 and soldered by a known method to make connections at the associated layers 222 of the board. Pins 118 of connector 160 may now be removably inserted into sockets 128 of base 120 to removable connect daughter board 204 to motherboard 202 both mechanically and electrically.
As should be appreciated from the two connector embodiments 100 and 160, the connector structure is scalable according to virtually any practical application and is expandable to any 2n×2m arrangement. All pins, shields and conductors may be made of copper or such a similarly conductive material. Body 162 of the connector 160 and body 164 of connector base 120 may be made from almost any electrically non-conductive material, such as plastic or ceramic, which has mechanical characteristics sufficient for supporting the mechanical connection, and which can withstand the prevailing temperatures of the channel. The insulating tube 114 and insulating cylinder 126 may be any dielectric material of proper insulating characteristics, such as Teflon.
A graph 500A of the differential mode S-parameter of one channel is shown in
The simulation results above show that the −3 dB differential insertion loss and −dB differential loss failure points extend from 8 GHz for a traditional high-speed connector style to 40 GHZ for the disclosed co-axial high-speed connector. The performance of the disclosed high-speed connector is well beyond 40 GHz due to the beneficial properties of the co-axial structure. Furthermore, the disclosed coaxial high-speed connector maintains the return loss of the S-parameter below −20 dB up to almost 39 GHZ, which significantly improves propagation of the high frequency portion of high-speed signal integrity, and ultimately enables transmission to exceed specifications beyond 80 GPbs.
It should be understood that the above disclosures are merely representative and that there are many possible embodiments for a connector for coaxial lines, and that the scope of the invention should only be limited according to the following claims made thereto.
