A metallic protective case for an electronic device having an antenna structure includes a first metallic case element and a second metallic case element. The first metallic case element includes at least two metallic case portions joined to each other by a first set of electrical insulators and also includes a lip. The second metallic case element is hingedly attached to the first metallic case element to form a hinged enclosure having an open position and a closed position. The hinged enclosure is adapted to receive the electronic device when in the open position and at least partially enclose the electronic device when in the closed position. The second metallic case element includes at least two metallic case portions joined to each other by a second set of electrical insulators, a first latch portion, and a second latch portion.