Removable electronic device case with supplemental antenna element

摘要

A removable case may receive an electronic device. A male connector in the case may mate with a female connector in the device. A battery in the case may supply power to the device through the male connector. The electronic device may have an antenna formed from peripheral conductive housing structures and an antenna ground. The case may have a supplemental antenna that restores antenna performance when the device is received within the case. The supplemental antenna may be formed from a monopole antenna resonating element coupled to the antenna ground through the power pin. The monopole element may have a portion that runs parallel to the peripheral conductive housing structures. During operation of the antenna in the electronic device, the supplemental antenna in the case may be indirectly fed by near-field coupling between the supplemental antenna and the antenna of the electronic device.

主权项

1. A removable electronic device case that is configured to mate with an electronic device that has an antenna and a connector port, comprising:
a body that is configured to receive the electronic device; a connector that mates with the connector port; and a supplemental antenna element that is configured to be near-field coupled to the antenna, wherein the supplemental antenna element has a first segment that is electrically connected to the connector and a second segment that runs parallel to a portion of the antenna, the second segment is configured to be capacitively coupled to the antenna, and the second segment passes under the first segment.