Segmented conductive ground plane for radio frequency isolation

摘要

A radio frequency (RF) module comprises an electrical reference, or ground, plane to which one or more RF devices disposed on the module are electrically coupled, and may be disposed beneath the RF devices. The reference plane may be segmented as to form one or more segments of the reference plane that are at least partially electrically isolated from surrounding segments or devices. A module may have a plurality of devices disposed thereon, wherein separate, at least partially isolated reference planes, correspond to different devices of the module. The reference plane may be etched or cut to achieve such segmentation.

主权项

1. An apparatus, comprising:
a substrate; first and second radio frequency devices mounted on the substrate; a plurality of wirebond structures disposed on the substrate between the first radio frequency device and the second radio frequency device; a first conductive ground layer disposed at least partially below the first radio frequency device and in electrical contact with one or more of the plurality of wirebond structures; a second conductive ground layer disposed at least partially below the second radio frequency device, the second conductive ground layer being at least partially electrically isolated from the first conductive ground layer; a molding dimensioned to at least partially encapsulate the first and second radio frequency devices and each of the one or more of the plurality of wirebond structures; and a first conductive top layer disposed above a top surface of the molding and in electrical contact with the one or more of the plurality of wirebond structures, such that the first conductive top layer, the plurality of wirebond structures, and the first conductive ground layer at least partially form a radio frequency barrier between the first radio frequency device and the second radio frequency device.