EDGE MOUNT CONNECTOR ARRANGEMENT WITH IMPROVED CHARACTERISTIC IMPEDANCE

摘要

An electrical interface on a circuit board is disclosed for electrically connecting the circuit board to a connector to reduce reflections and impedance mismatch and increase power transfer from the connector to the signal path of the circuit board. The signal interface includes a signal conductor including a signal pad configured to connect to a connector pin and a waveguide section extending from the signal pad. The waveguide narrows from a signal pad width to connect to a microstrip conductor. A first ground section is spaced rightward from the signal conductor such that the inner edge of the first ground section, angles in correspondence with the narrowing of the waveguide to generally track an outer right edge of the waveguide. A second ground section is spaced leftward from the signal conductor and configured generally similarly to the first ground section.

主权项

1. An interface including a Bayonet Neill-Concelman (BNC) connector and a printed circuit board (PCB) comprising:
a BNC connector including a connector signal pin and an outer ground terminal on each side of the connector signal pin, the connector signal pin generally centered in relation to the ground terminal; a PCB having an edge configured to receive the BNC connector, the PCB having multiple layers, the layers forming all or only a portion of the entire area of the PCB, the PCB layers including:
a first insulating support layer;a ground layer above the insulating support layer;a second insulating layer above the ground layer;a interface layer on the second insulating layer, the interface layer configured to electrically connect the PCB to the BNC connector, the interface layer including:a signal path comprising:
a signal pad electrically connected to the connector signal pin, the signal pad having a signal pad width;a waveguide section electrically connected to the signal pad, the waveguide section formed at a first end with the signal pad width and then tapering to a second end having a second width;microstrip trace electrically connected to the tapered second end of the waveguide section, the waveguide section having a width generally equal to the second width;a ground path electrically connected to the connector ground terminal, the ground path formed on each side of the signal path and including conductive vias that pass through the second insulating layer to electrically connect the ground path to the ground layer in the PCB.